Fix coverage reports (nodejs#972)

Author: szmarczak

package.json

@@ -33,14 +33,14 @@
     "build:wasm": "node build/wasm.js --docker",
     "lint": "standard | snazzy",
     "lint:fix": "standard --fix | snazzy",
-    "test": "tap test/*.js --no-coverage && mocha test/node-fetch && jest test/jest/test",
+    "test": "npm run test:tap && npm run test:node-fetch && npm run test:jest",
     "test:node-fetch": "node scripts/test-node-fetch.js 16 && mocha test/node-fetch || echo Skipping",
     "test:jest": "jest test/jest/test",
-    "test:tap": "tap test/*.js --no-coverage ",
-    "test:tdd": "tap test/*.js -w --no-coverage-report",
+    "test:tap": "tap test/*.js",
+    "test:tdd": "tap test/*.js -w",
     "test:typescript": "tsd",
-    "coverage": "standard | snazzy && tap test/*.js",
-    "coverage:ci": "npm run coverage -- --coverage-report=lcovonly",
+    "coverage": "nyc npm run test",
+    "coverage:ci": "npm run coverage -- --reporter=lcovonly",
     "bench": "concurrently -k -s first npm:bench:server npm:bench:run",
     "bench:server": "node benchmarks/server.js",
     "prebench:run": "node benchmarks/wait.js",
@@ -91,6 +91,9 @@
       "lib/llhttp/utils.js"
     ]
   },
+  "tap": {
+    "check-coverage": false
+  },
   "tsd": {
     "directory": "test/types",
     "compilerOptions": {