Renamed farmyardUpgrade to farmyardUpgrades

js/003-data/gameVariableData.js

src/data/backwardsCompatibility/backwardsCompatibility.js

src/facilities/farmyard/farmyard.js

src/facilities/farmyard/farmyard.tw

src/facilities/farmyard/food/foodAmount.js

src/facilities/farmyard/reports/farmyardReport.js

src/js/economyJS.js