Add more tests for IDBCursor update
Add more tests for IDBCursor delete
Merge pull request #986 from yunxiaoxie/yunxiaoxie/idbcursor-delete

Add more tests for IDBCursor delete
Use 'new TypeError()'
Updated
Merge pull request #885 from yunxiaoxie/yunxiaoxie/idbcursor-update

Add more tests for IDBCursor update