Increase connectivity bonus for drop variants

Increase connectivity bonus for drop variants

crazyhouse STC
LLR: -2.97 (-2.94,2.94) [0.00,10.00]
Total: 6655 W: 3246 L: 3251 D: 158
http://35.161.250.236:6543/tests/view/5c1bb69c6e23db24728955d7

crazyhouse LTC
LLR: -2.95 (-2.94,2.94) [0.00,10.00]
Total: 8857 W: 4309 L: 4281 D: 267
http://35.161.250.236:6543/tests/view/5c1bc8f56e23db24728955de

LLR: 2.97 (-2.94,2.94) [-10.00,5.00]
Total: 2160 W: 1067 L: 1016 D: 77
http://35.161.250.236:6543/tests/view/5c216fdf6e23db247289560b

shogi
LLR: 1.41 (-2.94,2.94) [0.00,10.00]
Total: 2219 W: 1106 L: 1027 D: 86

minishogi
LLR: 0.04 (-2.94,2.94) [0.00,10.00]
Total: 5000 W: 2362 L: 2289 D: 349