[Tests] only run the linter once, not on every build

.travis.yml

@@ -19,6 +19,8 @@ env:
 # osx backlog is often deep, so to be polite we can just hit these highlights
 matrix:
   include:
+  - env: LINT=true
+    node_js: lts/*
   - env: PACKAGE=resolvers/node
     node_js: 13
   - env: PACKAGE=resolvers/node
@@ -81,7 +83,7 @@ install:
   - 'if [ -n "${ESLINT_VERSION}" ]; then ./tests/dep-time-travel.sh; fi'
 
 script:
-  - 'npm test'
+  - 'if [ -n "${LINT-}" ]; then npm run posttest ; else npm run tests-only ; fi'
 
 after_success:
   - npm run coveralls

package.json

@@ -23,7 +23,8 @@
     "pretest": "linklocal",
     "posttest": "eslint .",
     "mocha": "cross-env BABEL_ENV=test NODE_PATH=./src nyc -s mocha -R dot --recursive -t 5s",
-    "test": "npm run mocha tests/src",
+    "tests-only": "npm run mocha tests/src",
+    "test": "npm run tests-only",
     "test-compiled": "npm run prepublish && NODE_PATH=./lib mocha --compilers js:babel-register --recursive tests/src",
     "test-all": "npm test && for resolver in ./resolvers/*; do cd $resolver && npm test && cd ../..; done",
     "prepublish": "npm run build",

resolvers/node/package.json

@@ -8,7 +8,8 @@
   ],
   "scripts": {
     "prepublishOnly": "cp ../../{LICENSE,.npmrc} ./",
-    "test": "nyc mocha",
+    "tests-only": "nyc mocha",
+    "test": "npm run tests-only",
     "coveralls": "nyc report --reporter lcovonly && cd ../.. && coveralls < ./resolvers/node/coverage/lcov.info"
   },
   "repository": {

resolvers/webpack/package.json

@@ -5,7 +5,8 @@
   "main": "index.js",
   "scripts": {
     "prepublishOnly": "cp ../../{LICENSE,.npmrc} ./",
-    "test": "nyc mocha -t 5s",
+    "tests-only": "nyc mocha -t 5s",
+    "test": "npm run tests-only",
     "report": "nyc report --reporter=html",
     "coveralls": "nyc report --reporter lcovonly && cd ../.. && coveralls < ./resolvers/webpack/coverage/lcov.info"
   },