Separate ESM/CJS TS definitions, bump esm2umd

[russellsteadman]

Fix for issue #109 as discussed in #109 (comment). Also bumped patch version of esm2umd to remove 2 security vulnerabilities.

[dcodeIO]

I guess it's not a problem when the UMD typings reexport an export default via export =?

long.js/umd/index.d.ts

Lines 1 to 2 in 3cea40d

	import Long from "../index.js";
	export = Long;

[russellsteadman]

I think that is the case. This might be good to test out -- I can add in some tests / just independently confirm. Currently though the package cannot be imported when using ESM and TypeScript. @dcodeIO

[russellsteadman]

@dcodeIO This does work when I tested it for both CommonJS and ESM.