Update specs for itemStack.
Update specs for itemStack.

brettle/atom,hellendag/atom,jordanbtucker/atom,florianb/atom,sotayamashita/atom,ashneo76/atom,florianb/atom,Mokolea/atom,daxlab/atom,florianb/atom,CraZySacX/atom,atom/atom,Austen-G/BlockBuilder,liuderchi/atom,bj7/atom,brettle/atom,scippio/atom,stinsonga/atom,stinsonga/atom,johnhaley81/atom,jordanbtucker/atom,Austen-G/BlockBuilder,sotayamashita/atom,CraZySacX/atom,Ingramz/atom,helber/atom,PKRoma/atom,florianb/atom,bsmr-x-script/atom,FIT-CSE2410-A-Bombs/atom,brettle/atom,stinsonga/atom,brumm/atom,decaffeinate-examples/atom,FIT-CSE2410-A-Bombs/atom,AdrianVovk/substance-ide,decaffeinate-examples/atom,PKRoma/atom,Austen-G/BlockBuilder,xream/atom,AdrianVovk/substance-ide,xream/atom,Mokolea/atom,bolinfest/atom,bolinfest/atom,Arcanemagus/atom,PKRoma/atom,johnhaley81/atom,Arcanemagus/atom,atom/atom,AdrianVovk/substance-ide,bj7/atom,ardeshirj/atom,Ingramz/atom,ardeshirj/atom,daxlab/atom,stinsonga/atom,tjkr/atom,scippio/atom,CraZySacX/atom,AlexxNica/atom,me-benni/atom,decaffeinate-examples/atom,bolinfest/atom,hellendag/atom,wiggzz/atom,ardeshirj/atom,kevinrenaers/atom,brumm/atom,gontadu/atom,t9md/atom,andrewleverette/atom,helber/atom,xream/atom,brumm/atom,bsmr-x-script/atom,t9md/atom,decaffeinate-examples/atom,florianb/atom,rlugojr/atom,Ingramz/atom,johnhaley81/atom,andrewleverette/atom,wiggzz/atom,sotayamashita/atom,daxlab/atom,tjkr/atom,hellendag/atom,bsmr-x-script/atom,Arcanemagus/atom,scippio/atom,Austen-G/BlockBuilder,ashneo76/atom,ashneo76/atom,tjkr/atom,me-benni/atom,rlugojr/atom,kevinrenaers/atom,jordanbtucker/atom,gontadu/atom,liuderchi/atom,wiggzz/atom,liuderchi/atom,atom/atom,kevinrenaers/atom,helber/atom,liuderchi/atom,t9md/atom,FIT-CSE2410-A-Bombs/atom,Mokolea/atom,Austen-G/BlockBuilder,bj7/atom,andrewleverette/atom,AlexxNica/atom,Austen-G/BlockBuilder,AlexxNica/atom,me-benni/atom,rlugojr/atom,gontadu/atom