[Tests] improve matrix; test on node 7 and 8; don’t run the linter more than once; disable sudo; enable fast finish

Author: ljharb

.travis.yml

@@ -1,13 +1,31 @@
 language: node_js
 node_js:
-  - 4
-  - 5
-  - 6
+  - "8"
+  - "7"
+  - "6"
+  - "5"
+  - "4"
 cache:
   yarn: true
   directories:
     - node_modules
 script:
-  - npm run test:ci
+  - if [ "${FLOW-}" = true ]; then npm run flow; fi
+  - if [ "${LINT-}" = true ]; then npm run lint; fi
+  - if [ "${TEST-}" = true ]; then npm run test:ci; fi
 after_success:
-  - npm run coveralls
+  - if [ "${TEST-}" = true ]; then npm run coveralls; fi
+sudo: false
+env:
+  global:
+    - TEST=true
+matrix:
+  fast_finish: true
+  include:
+    - node_js: "node"
+      env: FLOW=true TEST=false
+    - node_js: "node"
+      env: LINT=true TEST=false
+  allow_failures:
+    - node_js: "7"
+    - node_js: "5"

package.json

@@ -25,8 +25,9 @@
     "lint": "eslint  --config .eslintrc src __tests__ __mocks__ scripts",
     "prepublish": "safe-publish-latest && npm run lint && npm run flow && npm run test && npm run build",
     "pretest": "npm run lint:fix && npm run flow",
-    "test:ci": "npm test -- --ci --runInBand",
-    "test": "jest --coverage __tests__/**/*"
+    "test": "npm run jest",
+    "test:ci": "npm run jest -- --ci --runInBand",
+    "jest": "jest --coverage __tests__/**/*"
   },
   "devDependencies": {
     "babel-cli": "^6.24.1",