chore: group mocha options into test/mocha.opts

Dryer and help when wanting to run one specific test file (e.g. 
`mocha test/spec/lib/util.js`).

package.json

@@ -26,17 +26,17 @@
   },
   "scripts": {
     "build": "nearleyc lib/parser/regexp/parser.ne -o lib/parser/regexp/parser.js",
-    "coverage": "npm run build && istanbul cover --print detail node_modules/.bin/_mocha -- --require test/setup.js --recursive -b test/spec/",
+    "coverage": "npm run build && istanbul cover --print detail node_modules/.bin/_mocha -- test/spec/",
     "coveralls": "npm run coverage && cat ./coverage/lcov.info | coveralls && rm -rf ./coverage",
     "fixtures": "./bin/targaryen-specs -v -i -s test/spec/lib/parser/fixtures.json",
     "format": "npm run lint -- --fix",
     "lint": "eslint lib/ plugins/ test/ bin/targaryen",
     "lint:html": "(npm run -s lint -- --max-warnings 0 -f html -o lint.html && rm lint.html) || echo 'open lint.html for linting errors'",
     "prepare": "npm run build",
-    "test": "npm run build && mocha -r test/setup.js test/spec/ --recursive  && jasmine && node ./bin/targaryen --verbose test/integration/rules.json test/integration/tests.json",
-    "test:unit": "mocha -r test/setup.js test/spec/ --recursive",
+    "test": "npm run build && mocha test/spec/ && jasmine && node ./bin/targaryen --verbose test/integration/rules.json test/integration/tests.json",
+    "test:unit": "mocha test/spec/",
     "test:plugin:jest": "jest --colors test/jest",
-    "test:inspect": "node --inspect --debug-brk node_modules/.bin/_mocha -r test/setup.js test/spec/ --recursive"
+    "test:inspect": "node --inspect --debug-brk node_modules/.bin/_mocha test/spec/"
   },
   "author": "Harry Schmidt <[email protected]>",
   "license": "ISC",

test/mocha.opts

@@ -0,0 +1,3 @@
+--require test/setup.js
+--recursive
+--bail