v0.9.4

Added a couple of new mechanics:

• Card effects to generate new cards.
• Cards that expire after a specified amount of phases.
• Cards that stay in hand even across hands.
• Cards that charge by staying in hand.
• Cards that are active across multiple hands.

Added a few new cards that be found in the repertoire:

• Warrior: Battle Stance
• Warrior: Power Charge Strike
• Warrior: Vigorous Shield