This is not a function, but a static character array that holds
the version string of the SQLite library. This is the same value
returned by sqlite3_libversion(). The version string for
SQLite v3.6.23 is "3.6.23".
The version string for v3.6.23.1 is "3.6.23.1".
This value is also available at compile time as the SQLITE_VERSION macro. By
comparing the macro used at compile time to the sqlite3_version value found in
the current library, an application can verify that it is
linking against the correct version of the library.