Casparser

- Minor bug fixes in summary-statement parser.
- cli now uses [rich](http://rich.readthedocs.io/) for console output.
- Use poetry for dependency management and deployment.
- **BREAKING CHANGE**: Table output choices have been removed.
`-s/--summary` is a flag and doesn't accept any additional arguments.
- Support for folios without PAN (28).
- add support for new style dividend transactions after IDCW renaming.
- improved parser for transaction entries.

- New `sort_transactions` option in `casparser.read_cas_pdf` (and `--sort` flag in CLI)
to fix transactions (and balances) for schemes with non-chronological order.
- support negative balances in transactions

- Support for segregated portfolio transactions [ credits: [abhishekjain-qb](https://github.com/abhishekjain-qb) ]

- CSV output fixes
- better csv output format for summary CAS statements.
- option to output only summary information for detailed statements
(`-s fancy_grid -o output.csv`)

- ISIN, AMFI code mapping for schemes (**beta**)

- fixes unicode issues in windows
- supports negative scheme balances
- better scheme name parsing
- fixes dividend transaction parsing