chore: avoid dropping "parallel" tests

Author: brettz9

package.json

@@ -80,10 +80,10 @@
     "lint-fix": "eslint --report-unused-disable-directives --fix ./src ./test",
     "lint": "eslint --report-unused-disable-directives --ignore-pattern '!.ncurc.js' ./src ./test .ncurc.js",
     "lint-arg": "eslint --report-unused-disable-directives",
-    "test-cov": "cross-env BABEL_ENV=test nyc mocha --parallel --reporter dot --recursive --require @babel/register --timeout 12000",
-    "test-no-cov": "cross-env BABEL_ENV=test mocha --parallel --reporter dot --recursive --require @babel/register --timeout 12000",
+    "test-cov": "cross-env BABEL_ENV=test nyc mocha --reporter dot --recursive --require @babel/register --timeout 12000",
+    "test-no-cov": "cross-env BABEL_ENV=test mocha --reporter dot --recursive --require @babel/register --timeout 12000",
     "test-index": "cross-env BABEL_ENV=test mocha --recursive --require @babel/register --reporter progress --timeout 12000 test/rules/index.js",
-    "test": "cross-env BABEL_ENV=test nyc --reporter text-summary mocha --parallel --reporter dot --recursive --require @babel/register --timeout 12000",
+    "test": "cross-env BABEL_ENV=test nyc --reporter text-summary mocha --reporter dot --recursive --require @babel/register --timeout 12000",
     "prepare": "husky install"
   },
   "nyc": {