Upgrade github actions plugins (#64)

This should fix some deprecation warnings

Author: TheoKanning

.github/workflows/publish.yml

@@ -10,12 +10,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - name: Set up JDK 1.8
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v3
       with:
-        java-version: 1.8
+        distribution: temurin
+        java-version: 8
 
     - name: Test
       run: ./gradlew test

.github/workflows/test.yml

@@ -11,12 +11,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - name: Set up JDK 1.8
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v3
       with:
-        java-version: 1.8
+        distribution: temurin
+        java-version: 8
 
     - name: Test
       run: ./gradlew test --stacktrace