project port to 1.21 (this finally launches)

.github/workflows/build.yml

@@ -12,29 +12,26 @@ jobs:
       matrix:
         # Use these Java versions
         java: [
-          17,    # Current Java LTS & minimum supported by Minecraft
+          21,    # Current Java LTS
         ]
-        # and run on both Linux and Windows
-        os: [ubuntu-22.04, windows-2022]
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-22.04
     steps:
       - name: checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: validate gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
+        uses: gradle/wrapper-validation-action@v2
       - name: setup jdk ${{ matrix.java }}
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: ${{ matrix.java }}
           distribution: 'microsoft'
       - name: make gradle wrapper executable
-        if: ${{ runner.os != 'Windows' }}
         run: chmod +x ./gradlew
       - name: build
         run: ./gradlew build
       - name: capture build artifacts
-        if: ${{ runner.os == 'Linux' && matrix.java == '17' }} # Only upload artifacts built from latest java on one OS
-        uses: actions/upload-artifact@v3
+        if: ${{ matrix.java == '21' }} # Only upload artifacts built from latest java
+        uses: actions/upload-artifact@v4
         with:
           name: Artifacts
-          path: build/libs/
+          path: build/libs/