Bump @types/chai from 4.2.2 to 4.2.3 (#22)

Bumps [@types/chai](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/chai) from 4.2.2 to 4.2.3.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/chai)

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

yarn.lock

@@ -91,9 +91,9 @@
     to-fast-properties "^2.0.0"
 
 "@types/chai@^4.1.7":
-  version "4.2.2"
-  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.2.tgz#6b825013863d04868c15624ec8b7fdced88a47c6"
-  integrity sha512-8V2aCcPM3WLuJvJpF6N60uUvdZb7NHjpjQlLk1QmZbTP4XZET/FX0c3TJ3K7qt4L98FS1Pifa8BVofTVuJFWVA==
+  version "4.2.3"
+  resolved "https://registry.yarnpkg.com/@types/chai/-/chai-4.2.3.tgz#419477a3d5202bad19e14c787940a61dc9ea6407"
+  integrity sha512-VRw2xEGbll3ZiTQ4J02/hUjNqZoue1bMhoo2dgM2LXjDdyaq4q80HgBDHwpI0/VKlo4Eg+BavyQMv/NYgTetzA==
 
 "@types/mocha@^5.2.6":
   version "5.2.7"