fix: tsconfig noImplicitAny

[alexandre-abrioux]

While contributing to this repository I encountered a Typescript error when trying to use the library:

> yarn start

TSError: Unable to compile TypeScript:
src/index.ts:2:21 - error TS7016: Could not find a declaration file for module 'moving-averages'. 'fee-suggestions/node_modules/moving-averages/lib/index.js' implicitly has an 'any' type.
  Try `npm i --save-dev @types/moving-averages` if it exists or add a new declaration (.d.ts) file containing `declare module 'moving-averages';`

I found out here that changing noImplicitAny to false could fix this issue, and it did.

Edit: This is a patch that works but setting noImplicitAny to false is not a good solution for the long term. Feel free to close this PR. I would suggest migrating from moving-averages to moving-average (without the "s") that supports Typescript: https://www.npmjs.com/package/moving-average