Sqlean.py

- Updated to SQLite [3.45.0](https://sqlite.org/releaselog/3_45_0.html).
- `sqlean.py` is now versioned according to SQLite.

Print the actual error message when [regexp](https://github.com/nalgeon/sqlean/blob/main/docs/regexp.md) compilation fails (#104).

Before:

sql
select regexp_substr('abc5xyz', 'a(?<=\D*)\d');
-- Runtime error: out of memory (7)


Now:

sql
select regexp_substr('abc5xyz', 'a(?<=\D*)\d');
-- Runtime error: lookbehind assertion is not fixed length (offset 1)

Marked [unicode](https://github.com/nalgeon/sqlean/blob/main/docs/unicode.md) functions as deterministic to allow their use in virtual columns (#109).

- Added ARM support on Linux (courtesy of no23reason)
- Added source distribution (courtesy of edgarrmondragon)
- Removed support for Python 3.6 and 3.7.
- Updated to SQLite [3.44.0](https://sqlite.org/releaselog/3_44_0.html)

sqlite` [3.43.0](https://sqlite.org/releaselog/3_43_0.html) + `sqlean` [0.21.8](https://github.com/nalgeon/sqlean/releases/0.21.8).