Replace nyc with c8

.gitignore

@@ -1,6 +1,5 @@
+coverage/
+node_modules/
 .DS_Store
 *.log
-node_modules/
-.nyc_output/
-coverage/
 yarn.lock

cli.js

@@ -150,7 +150,8 @@ function transform(options) {
 
   plugins.push([filter, {allow: settings.allow, deny: settings.deny}])
 
-  /* istanbul ignore if - hard to check. */
+  // Hard to check.
+  /* c8 ignore next 3 */
   if (cli.flags.diff) {
     plugins.push(diff)
   }

filter.js

@@ -5,7 +5,8 @@ var control = require('remark-message-control')
 module.exports = filter
 
 function filter(options) {
-  var settings = options || /* istanbul ignore next */ {}
+  /* c8 ignore next */
+  var settings = options || {}
 
   if (settings.allow && settings.deny) {
     throw new Error(

package.json

@@ -82,7 +82,7 @@
     "vfile-sort": "^2.0.0"
   },
   "devDependencies": {
-    "nyc": "^15.0.0",
+    "c8": "^7.10.0",
     "prettier": "^2.0.0",
     "remark-cli": "^9.0.0",
     "remark-preset-wooorm": "^8.0.0",
@@ -92,21 +92,15 @@
   },
   "scripts": {
     "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
-    "test-api": "node test",
-    "test-coverage": "nyc --reporter lcov tape test/index.js",
+    "test-api": "node test/index.js",
+    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov npm run test-api",
     "test": "npm run format && npm run test-coverage"
   },
   "alex": {
     "allow": [
       "butt"
     ]
   },
-  "nyc": {
-    "check-coverage": true,
-    "lines": 100,
-    "functions": 100,
-    "branches": 100
-  },
   "prettier": {
     "tabWidth": 2,
     "useTabs": false,