Try #14:

.github/workflows/CI.yml

@@ -0,0 +1,36 @@
+name: CI
+
+on:
+  push:
+    branches:
+      # This is where pull requests from "bors r+" are built.
+      - staging
+      # This is where pull requests from "bors try" are built.
+      - trying
+      # Uncomment this to enable building pull requests.
+      #- master
+
+jobs:
+  test:
+    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }}
+    runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.version == 'nightly' }}
+    strategy:
+      matrix:
+        version:
+          - '1.1'
+          - '1'
+          - 'nightly'
+        os:
+          - windows-latest
+        arch:
+          - x86
+          - x64
+    steps:
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+      - uses: julia-actions/julia-buildpkg@latest
+      - uses: julia-actions/julia-runtest@latest

bors.toml

@@ -1,6 +1,6 @@
 status = [
   "continuous-integration/travis-ci/push",
-  "continuous-integration/appveyor/branch"
+  "CI / Julia 1%"
 ]
 delete_merged_branches = true
 # Uncomment this to use a two hour timeout.