The SQLite amalgamation source code

How to update the SQLite source code in this branch:

1. Download the SQLite amalgamation from the SQLite download page for the SQLite version you are upgrading to.

2. Validate the hash of the downloaded file with the hash on the download page.

3. Check out the sqlite branch of this repo:

   $ git switch sqlite
   $ git pull

4. Unpack the amalgamation source code and commit the changes.

   # Example with SQLite 3.41.2
   $ git commit -a -m "Add SQLite 3.41.2 sources"

5. Tag the new commit.

   # The fourth number is unused, but kept for compatibility with the build scripts
   $ git tag -sam "SQLite 3.41.2" sqlite-3.41.2.0

6. Push changes (including tags) upstream.