fix: coverage

NODE-2720

Author: Thomas Reggi

.nycrc.json

@@ -1,5 +1,4 @@
 {
   "extends": "@istanbuljs/nyc-config-typescript",
-  "include": ["src/**/*.ts"],
-  "reporter": ["lcovonly", "text-summary"]
+  "reporter": ["lcovonly", "text-summary", "html"]
 }

package.json

@@ -81,7 +81,8 @@
     "build": "npm run build:dts && npm run build:bundle",
     "lint": "eslint -v && eslint --ext '.js,.ts' --max-warnings=0 src test && tsc -v && tsc --noEmit",
     "format": "eslint --ext '.js,.ts' src test --fix",
-    "coverage": "nyc mocha test/node",
+    "coverage": "nyc npm run test-node",
+    "coverage:html": "npm run coverage && open ./coverage/index.html",
     "prepare": "node etc/prepare.js",
     "release": "standard-version -i HISTORY.md"
   },