Add 'stale' Github Action (#147)

Author: airsquared

.github/workflows/main.yml

@@ -18,10 +18,10 @@ jobs:
           java-package: jdk+fx
       - name: Create macOS app
         if: matrix.os == 'macOS-latest'
-        run: ./gradlew createApp
+        run: gradle createApp
       - name: Create Linux tar.gz
         if: matrix.os == 'ubuntu-latest'
-        run: ./gradlew createLinuxTargz
+        run: gradle createLinuxTargz
       - name: Create Windows exe
         if: matrix.os == 'windows-latest'
-        run: ./gradlew createWindowsInstaller
+        run: gradle createWindowsInstaller

.github/workflows/stale.yml

@@ -0,0 +1,19 @@
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+  - cron: "0 0 * * *"
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/stale@v1
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'This issue has been automatically marked stale because it has been open 20 days with no activity. If you would like this to remain open, please remove the stale label or comment, otherwise this issue will be closed in 3 days.'
+        days-before-stale: 20
+        days-before-close: 3
+        exempt-issue-labels: 'enhancement'