cgosqlite: update to SQLite 3.45.3

The 3.45 series has been out long enough now that the initial JSONB
issues have shaken out, and fixes to some regressions in the 3.44
series.

Of some interest are:
- Fix a couple of obscure UAF errors and an obscure memory leak.
- In partial index scans, if the WHERE clause implies a constant value for a table column, replace occurrences of that table column with the constant. This increases the likelihood of the partial index being a covering index.
- JSONB types.

Author: raggi