migrate to NYC

.gitignore

@@ -67,3 +67,4 @@ package-lock.json
 
 
 dist
+.nyc_output

.nycrc

@@ -0,0 +1,13 @@
+{
+  "reporter": [
+    "lcov",
+    "text"
+  ],
+  "include": [
+    "src/**/*.ts"
+  ],
+  "extension": [
+    ".ts"
+  ],
+  "all": true
+}

package.json

@@ -8,10 +8,10 @@
   },
   "scripts": {
     "build": "tsc",
-    "coverage": "istanbul cover _mocha -- --reporter spec --require ts-node/register 'test/index.ts'",
-    "coveralls": "npm run coverage && coveralls <coverage/lcov.info",
+    "coverage": "nyc mocha --reporter spec --require ts-node/register 'test/index.ts'",
+    "coveralls": "npm run coverage && nyc report --reporter=text-lcov | coveralls",
     "lint": "standard",
-    "test": "istanbul test mocha -- --reporter spec --require ts-node/register 'test/index.ts'",
+    "test": "mocha --reporter spec --require ts-node/register 'test/index.ts'",
     "webtest": "browserify test/max.js | testling -u"
   },
   "repository": {
@@ -42,9 +42,9 @@
     "@types/mocha": "^5.2.5",
     "@types/node": "^10.12.2",
     "bn.js": "^4.11.1",
+    "nyc": "^13.1.0",
     "coveralls": "^2.11.4",
     "ethereumjs-testing": "git+https://github.com/ethereumjs/ethereumjs-testing.git",
-    "istanbul": "^0.4.2",
     "mocha": "4.1.0",
     "standard": "^6.0.8",
     "ts-node": "^7.0.1",