Determine how to make better use of overloads for RPC methods

[buffalojoec]

Motivation

In many cases, such as defining parameters to functions that wrap over RPC methods, the optional configuration object, such as the many different configuration parameters supported by getBlock, can cause TypeScript a great deal of confusion when trying to accurately type-check.

In fact, it usually will not successfully type-check for heavily overloaded methods such as getBlock.

Details

At the moment, the proper approach is not yet known. However, we may need to investigate possibly re-working these overloads to be more friendly with TypeScript.