this enables the `noImplicitAny` flag in the Typescript compiler
> When the noImplicitAny flag is true and the TypeScript compiler cannot infer the type, it still generates the JavaScript files, but it also reports an error. Many seasoned developers prefer this stricter setting because type checking catches more unintentional errors at compile time.
closes: #1131
replaces #1137
* first stab at jschannel based player api
* semicolon purge
* more method-level docs; consolidate definitions
* missing definitions
* better match peertube's class conventions
* styling for embed tester
* basic docs
* add `getVolume`
* document the test-embed feature
Chocobozzz