More precise types

[daxadal]

Types on the index.d.ts could be more precise in order to improve TypeScript type inference.

• Values that were of type number now resolve to the actual constant number

  // Instead of...
  readonly CONTINUE: number;
  // ... now it is:
  readonly CONTINUE: 100;

• The code now specifically reflects that all numeric indexes resolve to a string.

  readonly [key: number]: string

• Fixed (possible) bug: All extra HTTP status numeric codes were defined as numbers, but typed as numeric strings

  // Instead of...
  readonly '527': string;
  // ... now it is:
  readonly 527: string;

[wdavidw]

A new version is now available, thank you!