message: fix: add nyc to appveyor
diff: @@ -11,6 +11,7 @@ install:
  - git config --global user.email "dxcli@example.com"
  - git config --global user.name "dxcli"
  - yarn
  + - yarn add -D nyc @dxcli/nyc-config
  test_script:
  - yarn test
  after_test:
  