When near-api-js updates TypeScript dependency, my project breaks

[chadoh]

Describe the bug
Recently (maybe a3e587b74), NAJ updated its TypeScript dependency. This caused the lib/index.d.ts file to use syntax that was only supported by TS version greater than 3.8:

 Syntax not supported by TS version < 3.8
 export * as aliasName from './path/to/the/file'

It took partners using an older version of TS a long time to track down and fix the issue.

NAJ should play more nicely with everyone relying on an older TS version, and give expectable deprecation warnings when support for a newer TS version is added.

Additional context
It looks like [this is a known frustration with TypeScript](microsoft/TypeScript#31907) that should ideally be fixed by the TypeScript team. However, the TS team did provide a rudimentary means for library authors to control this in September 2018: microsoft/TypeScript#26568

[vikinatora]

Closing as it's not relevant anymore.