Add dis_macro support

Adds dis_macro support used for calculating display names for records.

Add visitor to filter

Adds a Visitor trait that can be used with a haystack filter's node AST.

Also updated dependencies and implemented clippy suggestions.

Fix cmp and ord

Fixes some issues re. compare and ordering of Number and Coord types.
Some style changes and dependencies updates.

Update dependencies

• Dependencies update
• Fix on some issues uncovered by newer lint rules.

Fix Null Value hashcode

• Fixed issue with hash code calculation, see #12
• Make the library more modular, allows using just the units parts of the library for example

Fix issue with Grid JSON decoding

Fix issue #10

Fix security issue

Remove Wee-Alloc dependency as it was not maintained anymore and use the standard allocator for Wasm.

Updated dependencies and made sure it compiles with Rust 1.64.0

Update unit database

• Update the unit database from Fantom
• Make the ref list resolver apply to all comparator operators
• Refactor some internals of the filter and zinc parsers

Implement Ref list filtering

Add filtering support for Ref lists as defined in https://project-haystack.org/doc/docHaystack/Filters

Fix haystack filter parsing for `is a` queries

Fix for parsing the entire haystack filter when parsing a query with an is a query.