ci: force color for nox, allow only one runs per commit/PR (#77)

ci: force color for nox, allow only one runs per commit/PR

Author: skshetry

.github/workflows/release.yaml

@@ -2,6 +2,10 @@ name: Release
 on:
   release:
     types: [published]
+
+env:
+  FORCE_COLOR: "1"
+
 jobs:
   release:
     runs-on: ubuntu-latest

.github/workflows/tests.yaml

@@ -1,5 +1,13 @@
 name: Tests
 on: [push, pull_request]
+
+env:
+  FORCE_COLOR: "1"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
 jobs:
   tests:
     timeout-minutes: 15