remove public keyword from class functions

various small cleanups

add sort order to token

add data fetching

remove minimumDecimalPlaces argument

make new Fraction class more robust / generic

tweak tsconfig

Bump mixin-deep from 1.3.1 to 1.3.2

Bump lodash from 4.17.11 to 4.17.15

Bump handlebars from 4.1.2 to 4.5.3

Bumps [mixin-deep](https://github.com/jonschlinkert/mixin-deep) from 1.3.1 to 1.3.2.
- [Release notes](https://github.com/jonschlinkert/mixin-deep/releases)
- [Commits](https://github.com/jonschlinkert/mixin-deep/compare/1.3.1...1.3.2)
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