build(deps-dev): update @types/chai requirement from 4.1.5 to 4.1.6 (#…

…1163)

Updates the requirements on [@types/chai](https://github.com/DefinitelyTyped/DefinitelyTyped) to permit the latest version.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -2,7 +2,7 @@
   "private": true,
   "devDependencies": {
     "@types/babel-core": "^6.25.5",
-    "@types/chai": "4.1.5",
+    "@types/chai": "4.1.6",
     "@types/chai-as-promised": "7.1.0",
     "@types/escodegen": "0.0.6",
     "@types/esprima": "^2.1.31",