ci: trigger CI on version branches and detect MC version from tag for publishing

Author: Shweit

.github/workflows/master.yml

@@ -7,6 +7,7 @@ on:
   push:
     branches:
       - 'master'
+      - '*.x'
   schedule:
     # PaperMC doesn't change version numbers for latest releases meaning the build may break
     #   unexpectedly. Build every so often so that we know if a breaking change has been published

.github/workflows/publish.yml

@@ -38,6 +38,15 @@ jobs:
           echo "path=$JAR_PATH" >> $GITHUB_OUTPUT
           echo "Found JAR: $JAR_PATH"
 
+      - name: Determine game versions
+        id: game
+        run: |
+          if [[ "${{ github.ref_name }}" == *"-1.20"* ]]; then
+            echo "versions=>=1.20 <1.21" >> $GITHUB_OUTPUT
+          else
+            echo "versions=>=1.21" >> $GITHUB_OUTPUT
+          fi
+
       - name: Upload to Modrinth & CurseForge
         uses: Kir-Antipov/mc-publish@v3.3
         with:
@@ -53,7 +62,7 @@ jobs:
           version: ${{ steps.version.outputs.version }}
           version-type: ${{ github.event.release.prerelease && 'beta' || 'release' }}
 
-          game-versions: ">=1.21"
+          game-versions: ${{ steps.game.outputs.versions }}
 
           loaders: |
             paper