Setup reporting code coverage (#21)

.codecov.yml

@@ -0,0 +1,2 @@
+ignore:
+  - Tests

.travis.yml

@@ -16,7 +16,7 @@ matrix:
     - name: "macOS 10.14 | Swift 5.0 | Tests"
       os: osx
       osx_image: xcode10.2
-      env: SWIFT_VERSION="5.0"
+      env: SWIFT_VERSION="5.0" CODE_COVERAGE="YES"
   # - name: "macOS 10.14 | Swift 5.1"
   #   os: osx
   #   osx_image: xcode10.2
@@ -37,6 +37,9 @@ install:
   - if [[ $TRAVIS_OS_NAME == "linux" ]]; then
       eval "$(curl -sL https://swiftenv.fuller.li/install.sh)";
     fi
+  - if [[ $CODE_COVERAGE == "YES" ]]; then
+      gem install xcpretty;
+    fi
 script:
   - if [[ $SWIFT_LINT != "YES" ]]; then
       swift test -c debug --enable-code-coverage --sanitize thread;
@@ -50,3 +53,9 @@ script:
   - if [[ $SWIFT_LINT == "YES" ]]; then
       swiftlint lint --strict --reporter "emoji";
     fi
+after_success:
+  - if [[ $CODE_COVERAGE == "YES" ]]; then
+      swift package generate-xcodeproj --enable-code-coverage;
+      xcodebuild -scheme OpenCombine-Package build test | xcpretty;
+      bash <(curl -s https://codecov.io/bash) -t $CODECOV_TOKEN;
+    fi

README.md

@@ -1,5 +1,6 @@
 # OpenCombine
 [![Build Status](https://travis-ci.org/broadwaylamb/OpenCombine.svg?branch=master)](https://travis-ci.org/broadwaylamb/OpenCombine)
+[![codecov](https://codecov.io/gh/broadwaylamb/OpenCombine/branch/master/graph/badge.svg)](https://codecov.io/gh/broadwaylamb/OpenCombine)
 ![Language](https://img.shields.io/badge/Swift-5.0-orange.svg)
 ![Platform](https://img.shields.io/badge/platform-Linux%20%7C%20macOS%20%7C%20iOS%20%7C%20watchOS%20%7C%20tvOS-lightgrey.svg)
 

Tests/PerformanceBaselines/travis-ubuntu-16.04.yml

@@ -1,5 +1,5 @@
 CombineIdentifierTests:
   testDefaultInitializedPerformance:
     maxPercentRelativeStandardDeviation: 1e+1
-    measurement: 1.15590999999142e-4
+    measurement: 1.47168469999883e-4
     strategy: minimum