Incorrect Minimum Level being returned on Siege Machines

[btimothy-har]

troop = coc_client.get_troop(name="Siege Barracks",townhall=12)
m = troop.get_max_level_for_townhall(12)

returns m == 3, which is incorrect as Siege Barracks is not available at TH12.

Same issue persists for the following sieges at TH12:

• Log Launcher returns 3
• Flame Flinger returns 3

And at TH11:

• Battle Blimp returns 1
• Wall Wrecker returns 1
• Stone Slammer returns 1