chore(travis): add Windows target for Travis CI

.travis.yml

@@ -1,8 +1,13 @@
 sudo: true
 dist: trusty
-os:
-- linux
-- osx
+matrix:
+  include:
+    - os: linux
+    - os: osx
+    - os: windows
+      env:
+        - YARN_GPG=no # otherwise this starts gpg-agent that never exits
+
 language: node_js
 node_js:
 - '10.0.0'

package.json

@@ -10,8 +10,8 @@
     "postinstall": "download_deps --package package.json",
     "docs": "rimraf docs/ && jsdoc -c jsdoc.json",
     "test": "cross-env NODE_ENV=test mocha --recursive",
-    "test-coverage": "cross-env NODE_ENV=test istanbul cover _mocha --report lcovonly -- -R spec --recursive test",
-    "publish-coverage": "cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js",
+    "test-coverage": "cross-env NODE_ENV=test istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec --recursive test --timeout 6000",
+    "publish-coverage": "mv ./coverage/lcov.info ./node_modules/coveralls/bin/coveralls.js",
     "pre-pack": "npm run lint",
     "prepush": "npm run lint && cross-env NODE_ENV=dev npm run test",
     "prepublishOnly": "npm run lint && npm run test"