replace istanbul withnyc

package.json

@@ -7,11 +7,11 @@
     "eslint": "eslint index.js keywords spec",
     "test": "npm run eslint && npm run test-cov",
     "test-spec": "mocha spec/*.spec.js -R spec",
-    "test-cov": "istanbul cover -x '**/spec/**' node_modules/mocha/bin/_mocha -- spec/*.spec.js -R spec"
+    "test-cov": "nyc npm run test-spec"
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/epoberezkin/ajv-merge-patch.git"
+    "url": "git+https://github.com/ajv-validator/ajv-merge-patch.git"
   },
   "keywords": [
     "JSON",
@@ -29,9 +29,9 @@
   "author": "Evgeny Poberezkin",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/epoberezkin/ajv-merge-patch/issues"
+    "url": "https://github.com/ajv-validator/ajv-merge-patch/issues"
   },
-  "homepage": "https://github.com/epoberezkin/ajv-merge-patch#readme",
+  "homepage": "https://github.com/ajv-validator/ajv-merge-patch#readme",
   "dependencies": {
     "fast-json-patch": "^2.0.6",
     "json-merge-patch": "^0.2.3"
@@ -40,11 +40,21 @@
     "ajv": "^8.2.0",
     "coveralls": "^3.1.1",
     "eslint": "^7.8.1",
-    "istanbul": "^0.4.4",
     "mocha": "^9.0.3",
+    "nyc": "^15.1.0",
     "pre-commit": "^1.1.3"
   },
   "peerDependencies": {
     "ajv": ">=8.0.0"
+  },
+  "nyc": {
+    "exclude": [
+      "**/spec/**",
+      "node_modules"
+    ],
+    "reporter": [
+      "lcov",
+      "text-summary"
+    ]
   }
 }