Merge pull request #62 from hashicorp/peteski22/godocs

Updated godocs

Add any and all expression support. (#49)

* Add any and all expression support.

The syntax is inspired by Sentinel [Any, All Expressions](https://docs.hashicorp.com/sentinel/language/boolexpr#any-all-expressions)
and the [For Statements](https://docs.hashicorp.com/sentinel/language/loops#for-statements).

Merge pull request #38 from hashicorp/not-pre-disp

missing map key match operator dispositions

Merge pull request #24 from hashicorp/feature/unknownval

WithUnknownValue to treat unknown values as a non-error

Merge pull request #23 from hashicorp/forwardslash

Allow "/" in non-JSON-pointer identifiers

Add colons as valid separators for JSON Pointer pathing (#22)

We got a report of someone trying to filter with a path segment using a
colon and it not working. Colon isn't currently part of the allowed
punctuation list for identifiers.

Already JSON Pointer has a larger list of allowed punctuation than
native syntax, so I kept this scoped just to JSON Pointer. This PR:

- Adds colon to that list, enabling it to be used in JSON Pointer paths
- Adds tests of this
- Adds tests for both JSON Pointer and native syntax to ensure colon is
  accepted on the StringLiteral side. It _should_, but more tests is not
  a problem.

This also scopes down the set of targets calling `generate` so that
pigeon and co aren't required except when actually generating.

Comment update

Bump pointerstructure dep for tag handling that allows commas

Add an option to allow switching the tag name (#17)

This passes through the chosen name to pointerstructure, which already
supported custom tag names.

Fix panic when primitive equality fn not found (#16)

If a primitive equality function cannot be found it returns nil, but
currently the code does not check for this condition. This fixes it and
adds a test that panics without the change.