CI: Modernize csharp-npgsql project

- Use CrateDB 4.8.3, 4.8.4, and nightly
- Use most recent version of GHA recipes

Author: amotl

.github/workflows/tests-npgsql.yml

@@ -1,6 +1,8 @@
 name: Npgsql Tests
 
 on:
+
+  # Run job only on changes to specific directories.
   push:
     branches: [ main ]
     paths:
@@ -9,10 +11,19 @@ on:
     branches: [ main ]
     paths:
     - 'by-language/csharp-npgsql/**'
+
+  # Allow job to be triggered manually.
   workflow_dispatch:
+
+  # Run job each night after CrateDB nightly has been published.
   schedule:
     - cron: '0 2 * * *'
 
+# Cancel in-progress jobs when pushing to the same branch.
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.ref }}
+
 defaults:
   run:
     shell: bash
@@ -28,9 +39,9 @@ jobs:
       matrix:
         os: [ubuntu-latest]  # , macos-latest
         dotnet-version: ['3.1.x', '5.0.x']  # 6.0.0-preview.4
-        cratedb-version: ['4.3.2', '4.4.3', '4.5.1', 'nightly']
+        cratedb-version: ['4.8.3', '4.8.4', 'nightly']
         npgsql-version: ['5.0.5', '6.0.0-preview4']
-      fail-fast: true
+      fail-fast: false
 
     # https://docs.github.com/en/free-pro-team@latest/actions/guides/about-service-containers
     services:
@@ -41,9 +52,10 @@ jobs:
           - 5432:5432
 
     steps:
-      - uses: actions/checkout@v2
+      - name: Acquire sources
+        uses: actions/checkout@v3
       - name: Set up .NET ${{ matrix.dotnet-version }}
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v3
         with:
           dotnet-version: ${{ matrix.dotnet-version }}
 
@@ -67,6 +79,7 @@ jobs:
 
       # https://github.com/codecov/codecov-action
       - name: Upload coverage results to Codecov
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v3
         with:
+          flags: by-language/csharp-npgsql
           fail_ci_if_error: false