Reduces the bundle size by 8% (41kb)
BigInteger is now well supported so the library is no longer needed.
BigNumber was already being used by xrpl and they had almost identical
interfaces as they are both based on Java.
* Polyfill with "buffer" and "assert" for browser environments
* Instead of relying on webpack to make this library browser compatible, we now use a buffer library that provides a polyfill when used in the browser
* will compile as typescript
* migrated test suite to use JestJS
* Migrated to Jest testing framework and typescript source files
* updated deps
* updated prepublish
* resolved 1 failing test
* changed decimal .0 on four tests, it appears that these were the only four tests expecting integer values to have '.0'
* added linter
* added package-lock
* removed tslint in favor of eslint
* changed yarn to npm
* updated version 2.6->3.0
* removing package lock
* updated node version in nvmrc and jest version in package
* removed nvmrc
* removed some unused functions
* replaced data driven with file from master
* commitint yarn.lock
* removing babel as a dependency in favor of typescript compiling to es5
* removing babel deps
* resolved testing issues by migrating helper function
* added partial linting functionality for test suite
* updated imports for decodeLedgerData
* updated test
* updated yarn.lock
* removed a console.log
* added eslint-jest-plugin to package
* reverting to old linting, will add linting in next PR
* removed comments in shamap
* re-adding .nvmrc
* npm -> yarn
* added . to .eslintrc
* added .eslintrc
* removing linting for this PR
* Changed linting to print a message so that linting doesnt fail in CI
* changing back
* added newline so diff wont show
* removed eslint deps, since linting will be dealt with in a later PR
* changed function calls to describe(...)
