Sync frida-gum typings with Frida 12.6.14 (#37574)
Sync frida-gum typings with Frida 12.6.14 (#37574)

Also fix some bugs in the existing typings, and bump the major version
to avoid breaking existing consumers that rely on these bugs.

Changelog at:

    https://www.frida.re/news/2019/05/28/frida-12-6-released/
georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,mcliment/DefinitelyTyped,georgemarshall/DefinitelyTyped