BUNDLE: reduce bundle size of quadstore-comunica by working on immutable.js and decimal.js

[jacoscaz]

There are two potential avenues that might lead to shaving significantly more bytes out of quadstore-comunica's bundle:

1. using something other than Immutable.js and/or enabling tree-shaking so that only Immutable's Map ends up in the bundle
2. using one of the alternatives to decimal.js

Both of these require upstream work.

Number 1. in particular is a bit more complex as the Bindings type and factory function are declared separately in both comunica/comunica and comunica/sparqlee.

Plan and relevant PRs / commits:

• swap decimal.js with a lighter alternative
  • PR to comunica/sparqlee for swapping decimal.js with bignumber.js (MERGED!)
• move Bindings typings declaration from @comunica/bus-query-operation to @comunica/types and refactor the Bindings factory function into a BindingsFactory similar to RDF/JS DataFactory, moving it to a dedicated package @comunica/bindings-factory.
  • PR for shared implementation of bindings factory (MERGED!)
• Align @comunica/bindings-factory with the Queryable RDF/JS spec
  • Should the typings for the Queryable RDF/JS spec end up in @rdfjs/types?
• Align sparqlee to use @comunica/bindings-factory
• Produce an alternative version of @comunica/bindings-factory using the hamt library or a similar alternative to Immutable.js' Map, test it within quadstore-comunica.

[jacoscaz]

Potential alternatives to Immutable.js' Map:

• https://www.npmjs.com/package/hamt
• https://www.npmjs.com/package/@typed/hashmap

[jacoscaz]

Done! Will ship in the next version of quadstore-comunica.