Update amalgamation code

Support returning any from callbacks (mattn#1046)

Support returning any from callbacks

Update amalgamation code

Update amalgamation

Add sqlite3_file_control() support

This commit adds the SQLiteConn.FileControlInt() method which calls the
underlying sqlite3_file_control() function with an int argument. This can
be used for low-level operations on SQLite databases such as persisting
the WAL file after database close.

Temporary disable test for dropping vtable

bump codecov/codecov-action@v2 (mattn#957)

Update amalgamation code (mattn#955)

* Update amalgamation code

* Apply realPy's patch

Update amalgamation code

Update amalgamation code (mattn#896)