Rename say to log

[olistic]

Rename unit.say() to the more appropriate unit.log().

[codecov-io]

Codecov Report

Merging #131 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master    #131   +/-   ##
======================================
  Coverage    90.9%   90.9%           
======================================
  Files          80      80           
  Lines        1023    1023           
  Branches      162     162           
======================================
  Hits          930     930           
  Misses         77      77           
  Partials       16      16

Impacted Files	Coverage Δ
packages/warriorjs-abilities/src/walk.js	100% <100%> (ø)	⬆️
packages/warriorjs-core/src/Warrior.js	100% <100%> (ø)	⬆️
packages/warriorjs-abilities/src/bind.js	100% <100%> (ø)	⬆️
packages/warriorjs-abilities/src/detonate.js	100% <100%> (ø)	⬆️
packages/warriorjs-abilities/src/think.js	100% <100%> (ø)	⬆️
packages/warriorjs-effects/src/ticking.js	100% <100%> (ø)	⬆️
packages/warriorjs-abilities/src/attack.js	100% <100%> (ø)	⬆️
packages/warriorjs-abilities/src/pivot.js	100% <100%> (ø)	⬆️
packages/warriorjs-abilities/src/shoot.js	100% <100%> (ø)	⬆️
packages/warriorjs-core/src/Unit.js	100% <100%> (ø)	⬆️
... and 2 more

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