Clean up non-source files (#49)

- Delete old Travis CI config and Git mailmap
- Update .gitignore
- Update the CI status badge in the README

Author: mattrubin

.gitignore

@@ -1,29 +1,16 @@
+/.swiftpm/xcode/package.xcworkspace/
+
 # Xcode
 #
 # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
 
-## Build generated
-build/
-DerivedData/
-
-## Various settings
-*.pbxuser
-!default.pbxuser
-*.mode1v3
-!default.mode1v3
-*.mode2v3
-!default.mode2v3
-*.perspectivev3
-!default.perspectivev3
+## User settings
 xcuserdata/
 
-## Other
-*.moved-aside
-*.xccheckout
-*.xcscmblueprint
-
 ## Obj-C/Swift specific
 *.hmap
+
+## App packaging
 *.ipa
 *.dSYM.zip
 *.dSYM
@@ -38,8 +25,13 @@ playground.xcworkspace
 # Packages/
 # Package.pins
 # Package.resolved
+# *.xcodeproj
+#
+# Xcode automatically generates this directory with a .xcworkspacedata file and xcuserdata
+# hence it is not needed unless you have added a package configuration file to your project
+# .swiftpm
+
 .build/
-/.swiftpm/xcode/package.xcworkspace
 
 # CocoaPods
 #
@@ -57,23 +49,16 @@ playground.xcworkspace
 # Add this line if you want to avoid checking in source code from Carthage dependencies.
 # Carthage/Checkouts
 
-Carthage/Build
+Carthage/Build/
 
 # fastlane
 #
-# It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
-# screenshots whenever they are needed.
+# It is recommended to not store the screenshots in the git repo.
+# Instead, use fastlane to re-generate the screenshots whenever they are needed.
 # For more information about the recommended setup visit:
 # https://docs.fastlane.tools/best-practices/source-control/#source-control
 
 fastlane/report.xml
 fastlane/Preview.html
 fastlane/screenshots/**/*.png
 fastlane/test_output
-
-# Code Injection
-#
-# After new code Injection tools there's a generated folder /iOSInjectionProject
-# https://github.com/johnno1962/injectionforxcode
-
-iOSInjectionProject/

.mailmap

@@ -1,6 +1,6 @@
 # Bases
 
-[![Build Status](https://travis-ci.com/mattrubin/Bases.svg?branch=develop)](https://travis-ci.com/mattrubin/Bases)
+[![SPM CI status](https://github.com/mattrubin/Bases/actions/workflows/spm.yml/badge.svg)](https://github.com/mattrubin/Bases/actions/workflows/spm.yml)
 [![Code Coverage](https://img.shields.io/codecov/c/github/mattrubin/Bases/develop.svg)](https://codecov.io/gh/mattrubin/Bases)
 ![Swift 6.0](https://img.shields.io/badge/swift-6.0-orange.svg)
 ![Platforms: iOS, macOS, tvOS, watchOS, Linux](https://img.shields.io/badge/platforms-iOS%20%7C%20macOS%20%7C%20tvOS%20%7C%20watchOS%20%7C%20Linux-blue.svg)