add actions

Author: codehz

.github/workflows/test.yaml

@@ -0,0 +1,23 @@
+name: test
+
+on:
+  push:
+    paths-ignore:
+      - 'LICENSE'
+      - '*.md'
+    branches:
+      - develop
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+          - macOS-latest
+    run-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: jiro4989/setup-nim-action@v1
+      - run: nimble test -Y