Switch to GitHub Actions for CI

This also bumps our testing target platform to iPhone 8 (from iPhone 7)
because that's the minimum version available in GitHub's environment.

.github/workflows/ci.yaml

@@ -0,0 +1,47 @@
+---
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+      - 'releases/*'
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Build (${{ matrix.platform }})
+    runs-on: macOS-latest
+    strategy:
+      matrix:
+        platform: ['iOS Simulator,name=iPhone 8']
+    steps:
+      - uses: actions/checkout@v1
+      - name: Analyze and Test
+        run: |
+          xcodebuild clean analyze test \
+            -destination "platform=${{ matrix.platform }}" \
+            -sdk "iphonesimulator" \
+            -project PINCache.xcodeproj \
+            -scheme PINCache \
+            ONLY_ACTIVE_ARCH=NO \
+            CODE_SIGNING_REQUIRED=NO \
+          | xcpretty
+  cocoapods:
+    name: CocoaPods
+    runs-on: macOS-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Lint
+        run: pod lib lint
+  carthage:
+    name: Carthage
+    runs-on: macOS-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Update
+        run: carthage update --no-use-binaries --no-build
+      - name: Build
+        run: carthage build --no-skip-current

CHANGELOG.md

@@ -3,6 +3,7 @@
 * Add your own contributions to the next release on the line below this with your name.
 
 - [performance] Optimize `PINMemoryCache` remove objects when receive memory warning notification. [#251](https://github.com/pinterest/PINCache/pull/251)
+- [new] Migrated to GitHub Actions for continuous integration. [#259](https://github.com/pinterest/PINCache/pull/259)
 
 ## 3.0.1 -- Beta 8
 - [fix] Initing PINCache with TTL enabled should enable TTL on PINMemoryCache. [#246](https://github.com/pinterest/PINCache/pull/246)

Makefile

@@ -1,4 +1,4 @@
-PLATFORM="platform=iOS Simulator,name=iPhone 7"
+PLATFORM="platform=iOS Simulator,name=iPhone 8"
 SDK="iphonesimulator"
 SHELL=/bin/bash -o pipefail
 
@@ -25,4 +25,4 @@ carthage:
 	carthage update --no-use-binaries --no-build
 	carthage build --no-skip-current
 
-all: carthage lint test analyze
+all: carthage lint test analyze