[Added] codecov

.travis.yml

@@ -1,3 +1,6 @@
-language: objective-c
+language: swift
 osx_image: xcode11
-script: xcodebuild -sdk iphonesimulator -project ./SwiftUISampleApp/AttributedTextSample.xcodeproj -scheme AttributedTextSample -destination 'platform=iOS Simulator,name=iPhone Xʀ,OS=13.0' test
+script: 
+  - xcodebuild -sdk iphonesimulator -project ./SwiftUISampleApp/AttributedTextSample.xcodeproj -scheme AttributedTextSample -destination 'platform=iOS Simulator,name=iPhone Xʀ,OS=13.0' test
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,5 +1,6 @@
 # NSAttributedStringBuilder
 [![Build Status](https://travis-ci.org/ethanhuang13/NSAttributedStringBuilder.svg?branch=master)](https://travis-ci.org/ethanhuang13/NSAttributedStringBuilder)
+[![codecov](https://codecov.io/gh/ethanhuang13/NSAttributedStringBuilder/branch/master/graph/badge.svg)](https://codecov.io/gh/ethanhuang13/NSAttributedStringBuilder)
 [![GitHub release](https://img.shields.io/github/release/ethanhuang13/nsattributedstringbuilder.svg)]()
 ![GitHub top language](https://img.shields.io/github/languages/top/ethanhuang13/nsattributedstringbuilder.svg)
 [![License](https://img.shields.io/github/license/ethanhuang13/nsattributedstringbuilder.svg)](https://github.com/ethanhuang13/ladybug/blob/master/LICENSE)

SwiftUISampleApp/AttributedTextSample.xcodeproj/xcshareddata/xcschemes/AttributedTextSample.xcscheme

@@ -27,7 +27,24 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "YES"
-      codeCoverageEnabled = "YES">
+      codeCoverageEnabled = "YES"
+      onlyGenerateCoverageForSpecifiedTargets = "YES">
+      <CodeCoverageTargets>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "NSAttributedStringBuilder"
+            BuildableName = "NSAttributedStringBuilder"
+            BlueprintName = "NSAttributedStringBuilder"
+            ReferencedContainer = "container:..">
+         </BuildableReference>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "NSAttributedStringBuilderTests"
+            BuildableName = "NSAttributedStringBuilderTests"
+            BlueprintName = "NSAttributedStringBuilderTests"
+            ReferencedContainer = "container:..">
+         </BuildableReference>
+      </CodeCoverageTargets>
       <Testables>
          <TestableReference
             skipped = "NO">