Make Github Actions faster (#268)

Co-authored-by: budgidiere <sgidiere@gmail.com>

.github/workflows/build.yml

@@ -26,6 +26,7 @@ jobs:
     strategy:
       matrix:
         java: [15, 11, 8]
+      fail-fast: false
 
     steps:
     - name: Cancel Previous Runs
@@ -54,6 +55,15 @@ jobs:
          git config --global user.name "Github CI"
          sudo chmod -R -f 777 scripts
          ./yatopia init
+    - name: Get MC Version
+      run: echo "::set-output name=mcver::$(cat "Tuinity/Paper/work/BuildData/info.json"  | grep minecraftVersion | cut -d '"' -f 4)" 
+      id: mcver
+    - name: Pull Minecraft Decompile Cache
+      uses: actions/cache@v2
+      id: decompile-cache
+      with:
+        path: Tuinity/Paper/work/Minecraft/${{ steps.mcver.outputs.mcver }}
+        key: ${{ steps.mcver.outputs.mcver }}-${{ runner.os }}-minecraft-decomp
     - name: Build Yatopia
       run: |
         ./yatopia full