👷 sets up appveyor ci

appveyor.yml

@@ -0,0 +1,23 @@
+### Project specific config ###
+environment:
+  APM_TEST_PACKAGES:
+  ATOM_LINT_WITH_BUNDLED_NODE: "true"
+
+  matrix:
+  - ATOM_CHANNEL: stable
+  - ATOM_CHANNEL: beta
+
+### Generic setup follows ###
+build_script:
+  - ps: iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/atom/ci/master/build-package.ps1'))
+
+branches:
+  only:
+    - master
+
+version: "{build}"
+platform: x64
+clone_depth: 10
+skip_tags: true
+test: off
+deploy: off