diff --git a/.github/workflows/ci_pr_example.yml b/.github/workflows/ci_pr_example.yml
new file mode 100644
index 00000000..8ab262a5
--- /dev/null
+++ b/.github/workflows/ci_pr_example.yml
@@ -0,0 +1,27 @@
+name: PR Example app
+
+on: pull_request
+
+jobs:
+  tests:
+    name: Build Example app
+    runs-on: macOS-latest
+    steps:
+    - name: Checkout the Git repository
+      uses: actions/checkout@v2
+    - name: Cache Pods
+      uses: actions/cache@v1
+      with:
+        path: Pods
+        key: ${{ runner.os }}-pods-${{ hashFiles('**/Example/Podfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-pods-
+    - name: Cache SPM
+      uses: actions/cache@v1
+      with:
+        path: .build
+        key: ${{ runner.os }}-gems-${{ hashFiles('**/Example/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gems-
+    - name: Build and run example project
+      run: ./GitHubActions/build.sh example
diff --git a/.github/workflows/ci_pr_framework.yml b/.github/workflows/ci_pr_framework.yml
new file mode 100644
index 00000000..3093777a
--- /dev/null
+++ b/.github/workflows/ci_pr_framework.yml
@@ -0,0 +1,20 @@
+name: PR Framework
+
+on: pull_request
+
+jobs:
+  tests:
+    name: Build Framework
+    runs-on: macOS-latest
+    steps:
+    - name: Checkout the Git repository
+      uses: actions/checkout@v2
+    - name: Cache Carthage
+      uses: actions/cache@v1
+      with:
+        path: Carthage
+        key: ${{ runner.os }}-carthage-${{ hashFiles('**/Cartfile.resolved') }}
+        restore-keys: |
+          ${{ runner.os }}-carthage-
+    - name: Build framework
+      run: ./GitHubActions/build.sh framework
diff --git a/.github/workflows/ci_pr_tests.yml b/.github/workflows/ci_pr_tests.yml
new file mode 100644
index 00000000..cf1a250f
--- /dev/null
+++ b/.github/workflows/ci_pr_tests.yml
@@ -0,0 +1,20 @@
+name: PR Tests
+
+on: pull_request
+
+jobs:
+  tests:
+    name: Run Tests
+    runs-on: macOS-latest
+    steps:
+    - name: Checkout the Git repository
+      uses: actions/checkout@v2
+    - name: Cache Carthage
+      uses: actions/cache@v1
+      with:
+        path: Carthage
+        key: ${{ runner.os }}-carthage-${{ hashFiles('**/Cartfile.resolved') }}
+        restore-keys: |
+          ${{ runner.os }}-carthage-
+    - name: Build and run tests
+      run: ./GitHubActions/build.sh tests
diff --git a/.github/workflows/danger.yml b/.github/workflows/danger.yml
index 677dddd7..5dbb31fc 100644
--- a/.github/workflows/danger.yml
+++ b/.github/workflows/danger.yml
@@ -5,14 +5,17 @@ on: pull_request
 jobs:
   danger:
     name: Run Danger
-    runs-on: ubuntu-latest
+    runs-on: macOS-latest
     steps:
     - name: Checkout the Git repository
       uses: actions/checkout@v2
-    - name: Setup Ruby
-      uses: actions/setup-ruby@v1
+    - name: Cache Gems
+      uses: actions/cache@v1
       with:
-        ruby-version: '2.6'
+        path: vendor/bundle
+        key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gems-
     - name: Run build script
       run: gem install bundler && bundle install && bundle exec danger --fail-on-errors=true
       env:
diff --git a/.swiftlint.yml b/.swiftlint.yml
index 5ebf9e77..f0172b38 100644
--- a/.swiftlint.yml
+++ b/.swiftlint.yml
@@ -13,7 +13,6 @@ custom_rules:
     severity: warning # violation severity. optional.
 opt_in_rules:
   - explicit_top_level_acl
-explicit_acl: error
 explicit_top_level_acl: error
 included:
-  - Sources
\ No newline at end of file
+  - Sources
diff --git a/Dangerfile b/Dangerfile
index e8cb2911..3ef010fc 100644
--- a/Dangerfile
+++ b/Dangerfile
@@ -1,29 +1,49 @@
-# MessageKit, 2020
+#
+# MIT License
+# 
+# Copyright (c) 2017-2020 MessageKit
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
 
 # This runs on CI
 mergeable_state = github.pr_json["mergeable_state"]
 
 # Make it more obvious that a PR a draft
 if mergeable_state == "draft"
-  warn("PR is marked as Draft")
+    warn("PR is marked as Draft")
 end
 
 # Mainly to encourage writing up some reasoning about the PR, rather than just leaving a title
 if github.pr_body.length < 5
-  fail("Please provide a summary in the Pull Request description")
+    fail("Please provide a summary in the Pull Request description")
 end
 
 declared_hashtag = github.pr_title.include?("#trivial")
 hasChangelogEntry = git.modified_files.include?("CHANGELOG.md")
 if !hasChangelogEntry && !declared_hashtag
-  fail("Please include a CHANGELOG entry. \nYou can find it at [CHANGELOG.md](https://github.com/MessageKit/MessageKit/blob/master/CHANGELOG.md).")
+    fail("Please include a CHANGELOG entry. \nYou can find it at [CHANGELOG.md](https://github.com/MessageKit/MessageKit/blob/master/CHANGELOG.md).")
 end
 
 # Warn when there is a big PR
 if git.lines_of_code > 1000
-  warn("Big Pull Request - Please consider splitting up your changes into smaller Pull Requests.")
+    warn("Big Pull Request - Please consider splitting up your changes into smaller Pull Requests.")
 end
 
 swiftlint.config_file = '.swiftlint.yml'
-swiftlint.lint_files inline_mode:true
-swiftlint.lint_files fail_on_error:true
+swiftlint.lint_files inline_mode:true, fail_on_error:true
diff --git a/Gemfile b/Gemfile
index a98db9de..ce1c92bd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,26 @@
-# MessageKit, 2020
+#
+# MIT License
+# 
+# Copyright (c) 2017-2020 MessageKit
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
 
-source 'https://rubygems.org'
-gem 'danger', '~> 6.2'
-gem 'danger-swiftlint', '~> 0.24'
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.		
+
+source 'https://rubygems.org'		
+gem 'danger', '~> 6.2'		
+gem 'danger-swiftlint', '~> 0.24'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 00000000..71782c63
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,66 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    claide (1.0.3)
+    claide-plugins (0.9.2)
+      cork
+      nap
+      open4 (~> 1.3)
+    colored2 (3.1.2)
+    cork (0.3.0)
+      colored2 (~> 3.1)
+    danger (6.3.1)
+      claide (~> 1.0)
+      claide-plugins (>= 0.9.2)
+      colored2 (~> 3.1)
+      cork (~> 0.1)
+      faraday (~> 0.9)
+      faraday-http-cache (~> 2.0)
+      git (~> 1.6)
+      kramdown (~> 2.0)
+      kramdown-parser-gfm (~> 1.0)
+      no_proxy_fix
+      octokit (~> 4.7)
+      terminal-table (~> 1)
+    danger-swiftlint (0.24.1)
+      danger
+      rake (> 10)
+      thor (~> 0.19)
+    faraday (0.17.3)
+      multipart-post (>= 1.2, < 3)
+    faraday-http-cache (2.0.0)
+      faraday (~> 0.8)
+    git (1.6.0)
+      rchardet (~> 1.8)
+    kramdown (2.1.0)
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    multipart-post (2.1.1)
+    nap (1.1.0)
+    no_proxy_fix (0.1.2)
+    octokit (4.16.0)
+      faraday (>= 0.9)
+      sawyer (~> 0.8.0, >= 0.5.3)
+    open4 (1.3.4)
+    public_suffix (4.0.3)
+    rake (13.0.1)
+    rchardet (1.8.0)
+    sawyer (0.8.2)
+      addressable (>= 2.3.5)
+      faraday (> 0.8, < 2.0)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    thor (0.20.3)
+    unicode-display_width (1.6.1)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  danger (~> 6.2)
+  danger-swiftlint (~> 0.24)
+
+BUNDLED WITH
+   2.1.4
diff --git a/GitHubActions/build.sh b/GitHubActions/build.sh
new file mode 100755
index 00000000..3f998f9a
--- /dev/null
+++ b/GitHubActions/build.sh
@@ -0,0 +1,65 @@
+#!/bin/bash
+
+#
+# MIT License
+#
+# Copyright (c) 2017-2020 MessageKit
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+set -e
+function trap_handler {
+  echo -e "\n\nOh no! You walked directly into the slavering fangs of a lurking grue!"
+  echo "**** You have died ****"
+  exit 255
+}
+trap trap_handler INT TERM EXIT
+
+MODE="$1"
+
+if [ "$MODE" = "tests" -o "$MODE" = "all" ]; then
+  echo "Running MessageKit tests."
+  carthage bootstrap --platform ios
+  set -o pipefail && xcodebuild test -project MessageKit.xcodeproj -scheme MessageKitTests -destination "platform=iOS Simulator,name=iPhone 11 Pro" CODE_SIGNING_REQUIRED=NO | xcpretty -c
+  success="1"
+fi
+
+if [ "$MODE" = "framework" -o "$MODE" = "all" ]; then
+  echo "Building MessageKit Framework."
+  carthage bootstrap --platform ios
+  set -o pipefail && xcodebuild build -project MessageKit.xcodeproj -scheme MessageKit -destination "platform=iOS Simulator,name=iPhone 11 Pro" CODE_SIGNING_REQUIRED=NO | xcpretty -c
+  success="1"
+fi
+
+if [ "$MODE" = "example" -o "$MODE" = "all" ]; then
+  echo "Building & testing MessageKit Example app."
+  cd Example
+  gem install bundler
+  bundle check || bundle install
+  bundle exec pod install
+  set -o pipefail && xcodebuild build analyze -workspace ChatExample.xcworkspace -scheme ChatExample -destination "platform=iOS Simulator,name=iPhone 11 Pro" ONLY_ACTIVE_ARCH=NO CODE_SIGNING_REQUIRED=NO | xcpretty -c
+  success="1"
+fi
+
+if [ "$success" = "1" ]; then
+trap - EXIT
+exit 0
+fi
+
+echo "Unrecognised mode '$MODE'."
diff --git a/Sources/Models/AccessoryPosition.swift b/Sources/Models/AccessoryPosition.swift
index 04092026..cd2c486e 100644
--- a/Sources/Models/AccessoryPosition.swift
+++ b/Sources/Models/AccessoryPosition.swift
@@ -25,7 +25,7 @@
 import Foundation
 
 /// Used to determine the `Horizontal` and `Vertical` position of
-// an `AccessoryView` in a `MessageCollectionViewCell`.
+/// an `AccessoryView` in a `MessageCollectionViewCell`.
 public enum AccessoryPosition {
     
     /// Aligns the `AccessoryView`'s top edge to the cell's top edge.