unix-ffi/sqlite3: Add Connections.commit() function for compatibility.

To provide further compatibility between running cpython sqlite3 code
and micropython sqlite3 code the commit function is added. This function
does nothing, as per PEP 249, as micropythons usage of sqlite3 here
always uses autocommit mode.

Signed-off-by: Robert Klink <[email protected]>

Author: rhermanklink

unix-ffi/sqlite3/sqlite3.py

@@ -77,6 +77,9 @@ def __init__(self, h):
 
     def cursor(self):
         return Cursor(self.h)
+    
+    def commit(self):
+        pass
 
     def close(self):
         s = sqlite3_close(self.h)