build with Swift 5.9

.github/workflows/ci.yaml

@@ -6,7 +6,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: norio-nomura/action-swiftlint@3.2.1
   macos-test:
     strategy:
@@ -15,7 +15,7 @@ jobs:
           - "5.7"
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: swift-actions/setup-swift@v1
         with:
           swift-version: ${{ matrix.swift-version }}
@@ -24,6 +24,8 @@ jobs:
     strategy:
       matrix:
         swift-version:
+          - "5.9"
+          - "5.8"
           - "5.7"
           - "5.6"
           - "5.5"
@@ -40,5 +42,5 @@ jobs:
   ios-build:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: xcodebuild -scheme vincenty -destination 'platform=iOS Simulator,name=iPhone 13'

README.md

@@ -1,6 +1,6 @@
 # vincenty
 
-[![Swift Version](https://img.shields.io/badge/swift-5.7-blue.svg)](https://swift.org) 
+[![Swift Version](https://img.shields.io/badge/swift-5.9-blue.svg)](https://swift.org) 
 ![Platform](https://img.shields.io/badge/platform-macOS|linux--64-lightgray.svg)
 ![Build](https://github.com/dastrobu/vincenty/actions/workflows/ci.yaml/badge.svg)