Run coveralls only in Node 10 (#2857)

.travis.yml

@@ -5,24 +5,24 @@ sudo: false
 jobs:
   include:
     - node_js: 8
-      env: BROWSER=false
+      env: EXTRA=false
     - node_js: 10
-      env: BROWSER=true
+      env: EXTRA=true
     - node_js: 14
-      env: BROWSER=false
+      env: EXTRA=false
 before_install:
   - npm install -g karma-cli
 before_script:
   - npm install karma-sauce-launcher
 script:
   - npm test
-  - "[ $BROWSER = false ] || npm run test-browser"
-  - "[ $BROWSER = false ] || karma start karma.conf-sauce.js"
+  - "[ $EXTRA = false ] || npm run test-browser"
+  - "[ $EXTRA = false ] || karma start karma.conf-sauce.js"
+  - "[ $EXTRA = false ] || npm run coveralls"
 notifications:
   email: false
 env:
   global:
   - NPM_CONFIG_PROGRESS="false"
   - secure: bDZSBQfqr21hCayjcZ20IxrV6+XGhxQPFIfwWqEKLrF93Gu8LLVjZRxXE/mE8I8N4Z5WtDNb4ZHrm/TTzmcPa5MuHgIxEdknQCncobH8oimwc83SHwEPk6okeNKl39VlCjvvnmoe/V/KpnknuYn3Rqghtl/Uv9KLpCwskwjTtcw=
   - secure: SRECgXuwcZTcD3GVxTS2bYNgRyye4vq6BLrV2PH9FyNenowsKQR2EwlC/dppc1Q8NWMgv79J/R96q9JOFh+mEH9L5dlBb2yhnGH8amVeM/ChAJHT/F8YktKM453uVpz5fR00QcCQDDUOx6Pvx374ID0OKNpWKAkQBWA9mPTsLnE=
-after_success: npm run coveralls