chore(tests): test against both [email protected] and upcoming `cereb…

…[email protected]`

.gitignore

@@ -1,2 +1,3 @@
 node_modules
 coverage
+.nyc_output

package.json

@@ -5,8 +5,9 @@
   "main": "index.js",
   "scripts": {
     "pretest": "standard",
-    "test": "nodeunit tests",
-    "coverage": "istanbul cover nodeunit tests",
+    "test": "nodeunit tests && npm i [email protected] && nodeunit tests",
+    "posttest": "npm i",
+    "coverage": "nyc --reporter=lcov --reporter=text npm run test",
     "postcoverage": "cat ./coverage/lcov.info | coveralls",
     "semantic-release": "semantic-release pre && npm publish && semantic-release post"
   },
@@ -56,13 +57,18 @@
     "coveralls": "^2.11.9",
     "cz-customizable": "^3.1.0",
     "ghooks": "^1.2.0",
-    "istanbul": "^0.4.3",
     "nodeunit": "^0.9.1",
+    "nyc": "^6.4.0",
     "semantic-release": "^4.3.5",
     "standard": "^6.0.8",
     "validate-commit-msg": "^2.5.0"
   },
   "peerDependencies": {
     "cerebral": "^0.33.31 || ^0.34.0-0"
+  },
+  "nyc": {
+    "exclude": [
+      "tests/*"
+    ]
   }
 }