Parse function typed params with namespace

[mmisol]

Purpose

Fixes a parser incompatibility with typed parameters in a function
signature when these contained a namespace declaration. Tests are added
for this and related cases.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Reviewers

@aparajit-pratap @QilongTang

FYIs

@DynamoDS/dynamo

[aparajit-pratap]

Brilliant, thanks for fixing this!