Solc-select

**NOTE: This is a beta release.**

Added
- Windows support (54)
- Minimum/maximum version validation (57)
- Adds an `--always-install` flag to `solc-select use` (79)
- Python types to the codebase (55)
- sha3 and keccak256 checksum checks (67)

Changed
- Specific regex validation (71)
- Standardized error handling across the codebase (77)
- Introduces breaking changes in storing solc binaries (54)

This release adds support for Linux versions from `0.4.0 - 0.4.9` (see 53 for context).

This release transforms `solc-select` into a proper python package which can be installed with `pip`. This version uses native `solc` binaries on Linux and macOS and doesn't require Docker (check https://github.com/crytic/solc-select/pull/38 for more context). The CLI arguments have changed, please refer to the README for examples or run `solc-select --help` after installing.