Use codecov instead of coveralls

.travis.yml

@@ -23,15 +23,13 @@ install:
 - npm install
 - npm update
 before_script: test/ci/_before_script.js
-after_success: npm run coveralls
+after_success: npm run codecov
 branches:
   only:
   - master
   - /^v\d+\.\d+\.\d+/
 env:
   global:
-    # coveralls token
-    - secure: hG3cs8/tOGTa8IPewVuahcp1f8gwsk/rX7ReUBPag6cdZdJpkbjzxp8R97mhhCrFOP/fvX8zAbCelXvvhME/mjZTFgzSNHLBL/SJreHP5m2B1yxXkroiQFu1qwewvzzKmfcs5W1CD8J8WbJuBk9zozDQG9c1OxTaK87tBGh1xik=
     # prevent wine popup dialogs about installing additional packages
     - WINEDLLOVERRIDES="mscoree,mshtml="
     - WINEDEBUG="-all"

package.json

@@ -39,7 +39,7 @@
   "devDependencies": {
     "ava": "^0.24.0",
     "buffer-equal": "^1.0.0",
-    "coveralls": "^3.0.0",
+    "codecov": "^3.0.0",
     "eslint": "^4.1.0",
     "eslint-config-standard": "^10.0.0",
     "eslint-plugin-ava": "^4.3.0",
@@ -57,7 +57,7 @@
     "node": ">= 4.0"
   },
   "scripts": {
-    "coveralls": "nyc report --reporter=text-lcov | coveralls",
+    "codecov": "nyc report --reporter=text-lcov > coverage.lcov && codecov",
     "lint": "eslint .",
     "test": "npm run lint && nyc ava test/index.js"
   },

test/ci/appveyor.yml

@@ -29,5 +29,6 @@ test_script:
 - npm --version
 - node test/ci/_before_script.js
 - npm test
+- npm run codecov
 
 build: off