Fix version number in readme (#20)

- fix version number

Basic currency type for SQL query (#18)

- Add public query type
- Add query tests
- Updated README

Fix query consumption issue (#16)

⚠️ Breaking changes:
- With-style API for transaction & connection
- Using RowSequence in a handler instead of a return value
- Query result renamed to RowSequence
- Remove execute API from database client
- Improve transaction error interface
- Sendable fixes

🐞 Known issues: 
- Query is not a real "currency type" yet, this will be addressed later
on if needed.

API improvements (#15)

- ⚠️ [API breaking change]: Transaction & connection API functions
returns a generic type instead of a database result.
- Readme updates & fixes

Improve readme (#14)

added filter group to count (#12)

added KeyTypeAccessor (#11)

remove keyname (#10)

fixed uint count (#9)

fix count (#8)