Upgrade dependencies.

package.json

@@ -15,14 +15,13 @@
   },
   "devDependencies": {
     "@nodeguy/assert": "0.1.4",
-    "eslint": "4.19.1",
+    "@stryker-mutator/core": "1.1.0",
-    "mocha": "5.0.5",
+    "@stryker-mutator/javascript-mutator": "1.1.0",
-    "nyc": "11.6.0",
+    "@stryker-mutator/mocha-framework": "1.1.0",
-    "stryker": "0.25.1",
+    "@stryker-mutator/mocha-runner": "1.1.0",
-    "stryker-api": "0.18.0",
+    "eslint": "5.15.3",
-    "stryker-javascript-mutator": "0.8.0",
+    "mocha": "5.2.0",
-    "stryker-mocha-framework": "0.11.0",
+    "nyc": "13.3.0"
-    "stryker-mocha-runner": "0.13.0"
   },
   "homepage": "https://github.com/NodeGuy/channel",
   "keywords": [

stryker.conf.js

@@ -1,11 +1,11 @@
 module.exports = function(config) {
   config.set({
-    testRunner: "mocha",
     mutator: "javascript",
+    packageManager: "yarn",
+    reporters: ["clear-text", "progress"],
+    testRunner: "mocha",
     transpilers: [],
-    reporter: ["clear-text", "progress"],
     testFramework: "mocha",
-    coverageAnalysis: "perTest",
+    coverageAnalysis: "perTest"
-    mutate: ["lib/**/*.js"]
   });
 };