Pydbml

- Fix: removing indentation bug

- Fix: (26) bug in note empty line stripping, thanks Jaschenn for reporting
- New: get_references_for_sql table method

- Fix: junction table now has the schema of the first referenced table (as introduced in DBML 2.4.3)
- Fix: typing issue which failed for Python 3.8 and Python 3.9

- New: referenced tables in SQL are now defined first in SQL (23 reported by minhl)
- Fix: single quotes were not escaped in column notes (24 reported by fivegrant)

- Fix: inline many-to-many references were not rendered in sql

- New: "backslash newline" is supported in note text (line continuation)
- New: notes have reference to their parent. Note.sql now depends on type of parent (for tables and columns it's COMMENT ON clause)
- New: pydbml no longer splits long notes into multiple lines
- Fix: inline ref schema bug, thanks to jens-koster
- Fix: (16) notes were not idempotent, thanks jens-koster for reporting
- Fix: (15) note objects were not supported in project definition, thanks jens-koster for reporting
- Fix: (20) schema didn't work in table group definition, thanks mjfii for reporting
- Fix: quotes in note text broke sql and dbml
- New: proper support of composite primary keys without creating an index
- New: support of many-to-many relationships