Please fill in this template.

• [x ] Use a meaningful title for the pull request. Include the name of the package modified.
• [x ] Test the change in your own code. (Compile and run.)
• [ x] Follow the advice from the readme.
• [ x] Avoid common mistakes.
• [ x] Run npm run lint package-name (or tsc if no tslint.json is present).

Select one of these and delete the others:

If adding a new definition:

• The package does not provide its own types, and you can not add them.
• If this is for an NPM package, match the name. If not, do not conflict with the name of an NPM package.
• Create it with dts-gen --dt, not by basing it on an existing project.
• tslint.json should be present, and tsconfig.json should have noImplicitAny, noImplicitThis, strictNullChecks, and strictFunctionTypes set to true.