Merge remote-tracking branch 'origin/main' into chore/utoipa

.github/workflows/rust.yaml

@@ -2,16 +2,12 @@ name: Rust build, test, and generate specification
 
 on:
   push:
-    paths-ignore:
-      - ".github/**"
-      - "!.github/workflows/rust.yaml"
-      - ".vscode/**"
-      - "doc/**"
-      - ".gitignore"
-      - "LICENSE"
-      - "README"
-  pull_request:
     branches: [main]
+  pull_request:
+
+concurrency: 
+  group: ${{ github.head_ref }}
+  cancel-in-progress: true
 
 env:
   CARGO_TERM_COLOR: always
@@ -22,6 +18,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Free up disk space
+        run: |
+          sudo rm -rf /usr/local/lib/android /usr/share/dotnet /opt/ghc
+
       - name: Install latest stable
         uses: actions-rs/toolchain@v1
         with: