ci: improve build by setting concurrency and protoc version + add dep…

…endabot.yml for outdated deps.

Signed-off-by: Lachezar Lechev <[email protected]>

.github/dependabot.yml

@@ -0,0 +1,8 @@
+version: 2
+# Check for outdated actions
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    # Check for updates every Monday
+    schedule:
+      interval: "weekly"

.github/workflows/build.yml

@@ -5,6 +5,20 @@ on:
     branches:
       - '**'
 
+# Stops the running workflow of previous pushes
+concurrency:
+  group: ${{ github.ref }}-android
+  cancel-in-progress: true
+
+env:
+  # For the confusing protoc versioning check out these docs:
+  # https://protobuf.dev/support/version-support/
+  # v3.26.x, where `.x` is a wildcard
+  #
+  # For stremio-core-android we use version 3.21
+  # Check build.gradle.kts
+  PROTOC_VERSION: '21.x'
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -15,6 +29,8 @@ jobs:
       # add protoc because of stremio-core-csharp
       - name: Install Protoc
         uses: arduino/setup-protoc@v3
+        with:
+          version: "${{ env.PROTOC_VERSION }}"
 
       - name: Rust setup (1.67.1)
         uses: dtolnay/[email protected]

.github/workflows/release.yml

@@ -10,7 +10,7 @@ jobs:
     timeout-minutes: 60
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Java
         uses: actions/setup-java@v3
         with: