Bump CircleCI image to 11.4 and remove the need for libxml install

.circleci/config.yml

@@ -6,7 +6,7 @@ defaults:
       CIRCLE_TEST_REPORTS: /tmp/circleci-test-results
       BUNDLE_PATH: vendor/bundle
     macos:
-      xcode: "11.3.1"
+      xcode: "11.4.0"
     shell: /bin/bash --login -eo pipefail
   - &prepare-storage
     run:
@@ -17,7 +17,8 @@ defaults:
       name: Enable Ruby Auto-Switching
       command: >
         echo "source /usr/local/share/chruby/chruby.sh" >> ~/.bash_profile;
-        echo "source /usr/local/share/chruby/auto.sh" >> ~/.bash_profile
+        echo "source /usr/local/share/chruby/auto.sh" >> ~/.bash_profile;
+        chruby
   - &restore-gems
     restore_cache:
       keys:
@@ -103,17 +104,18 @@ jobs:
       - *restore-gems
       - *install-gems
       - *store-gems
-      - restore_cache:
-          keys:
-            - homebrew-{{ checksum ".circleci/config.yml" }}
-            - homebrew-
-      - run:
-          name: Install libxml2
-          command: brew install libxml2 && brew link --force libxml2
-      -  save_cache:
-          key: homebrew-{{ checksum ".circleci/config.yml" }}
-          paths:
-            - /usr/local/Homebrew
+      # libxml2 is not needed anymore with latest Kanna and Xcode 11.4+
+      # - restore_cache:
+      #     keys:
+      #       - homebrew-{{ checksum ".circleci/config.yml" }}
+      #       - homebrew-
+      # - run:
+      #     name: Install libxml2
+      #     command: brew install libxml2 && brew link --force libxml2
+      # - save_cache:
+      #     key: homebrew-{{ checksum ".circleci/config.yml" }}
+      #     paths:
+      #       - /usr/local/Homebrew
       - run:
           # TODO: This should run the tests once SPM supports testing an executable
           name: Build with SPM

.ruby-version

@@ -1 +1 @@
-2.6.5
+2.6.6

Rakefile

@@ -15,7 +15,7 @@ SCHEME_NAME = 'swiftgen'.freeze
 CONFIGURATION = 'Debug'.freeze
 RELEASE_CONFIGURATION = 'Release'.freeze
 POD_NAME = 'SwiftGen'.freeze
-MIN_XCODE_VERSION = 11.2
+MIN_XCODE_VERSION = 11.4
 
 BUILD_DIR = File.absolute_path('./build')
 BIN_NAME = 'swiftgen'.freeze