Fix BCD month for #8

Author: Gadgetoid

library/rv3028/__init__.py

@@ -67,7 +67,7 @@ def __init__(self, i2c_addr=0x26, i2c_dev=None):
                 BitField('date', 0b00111111, adapter=BCDAdapter()),
             )),
             Register('MONTH', 0x05, fields=(
-                BitField('month', 0b00001111, adapter=BCDAdapter()),
+                BitField('month', 0b00011111, adapter=BCDAdapter()),
             )),
             Register('YEAR', 0x06, fields=(
                 BitField('year', 0xFF, adapter=BCDAdapter()),