Support mocha@6, #217

package.json

@@ -50,18 +50,19 @@
  "prepublishOnly": "npm run clean && npm run build",
  "pretest": "npm run prepublishOnly",
  "test": "bash test/index.sh",
- "test:ci": "npm run tslint && npm run test:mocha-3 && npm run test:mocha-4 && npm run test:mocha-5",
+ "test:ci": "npm run tslint && npm run test:mocha-3 && npm run test:mocha-4 && npm run test:mocha-5 && npm run test:mocha-6",
  "test:mocha-3": "npm install mocha@3 --no-save && npm test",
  "test:mocha-4": "npm install mocha@4 --no-save && npm test",
  "test:mocha-5": "npm install mocha@5 --no-save && npm test",
+ "test:mocha-6": "npm install mocha@6 --no-save && npm test",
  "tslint": "tslint -p . -c tslint.json 'src/**/*.ts'"
  },
  "license": "MIT",
  "engines": {
  "node": ">=8"
  },
  "peerDependencies": {
- "mocha": "3.0.0 - 5.x.x"
+ "mocha": "3.0.0 - 6.x.x"
  },
  "devDependencies": {
  "@types/circular-json": "^0.4.0",