Minimise use of parser (#1071)

* Upgrade dependencies

* avoid parsing an extra time if the last parsed version matches the inferred version

* caching the parser for multiple calls to the parser

* using the new parser for ImportDirective tests

* fixing the parser possibly being undefined

* remove the non-deterministic behaviour when the cached parser is used to infer a document with no pragmas

* small performance improvement by having the query array set as a constant instead of creating the array in every call

Author: Janther