Add CI through gh actions

Author: musm

.github/workflows/CI.yml

@@ -0,0 +1,37 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+      - release-*
+    tags: '*'
+  pull_request:
+
+jobs:
+  name: julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }}
+  runs-on: ${{ matrix.os }}
+  strategy:
+    fail-fast: false
+    matrix:
+      version:
+        - '1.3'
+        - '1'
+        - 'nightly'
+      os:
+        - ubuntu-latest
+        - macOS-latest
+        - windows-latest
+      arch:
+        - x64
+        - x86
+  steps:
+    - uses: actions/checkout@v2
+    - uses: julia-actions/setup-julia@latest
+      with:
+        version: ${{ matrix.version }}
+        arch: ${{ matrix.arch }}
+    - uses: julia-actions/julia-buildpkg@latest
+    - uses: julia-actions/julia-runtest@latest
+      with:
+        file: lcov.info