warn on deprecated availDate in testInfo.json
warn on deprecated availDate in testInfo.json

tbretl/PrairieLearn,lotrfan/PrairieLearn,mwest1066/PrairieLearn,kevinwang/PrairieLearn,rbessick5/PrairieLearn,lotrfan/PrairieLearn,kevinwang/PrairieLearn,rbessick5/PrairieLearn,kevinwang/PrairieLearn,mwest1066/PrairieLearn,kevinwang/PrairieLearn,kevinwang/PrairieLearn,PrairieLearn/PrairieLearnHack,PrairieLearn/PrairieLearnHack,jakebailey/PrairieLearn,PrairieLearn/PrairieLearnHack,tbretl/PrairieLearn,lotrfan/PrairieLearn,kevinwang/PrairieLearn,mwest1066/PrairieLearn,tbretl/PrairieLearn,parasgithub/PrairieLearn,parasgithub/PrairieLearn,parasgithub/PrairieLearn,kevinwang/PrairieLearn,lotrfan/PrairieLearn,PrairieLearn/PrairieLearnHack,jakebailey/PrairieLearn,PrairieLearn/PrairieLearnHack,parasgithub/PrairieLearn,mwest1066/PrairieLearn,lotrfan/PrairieLearn,mwest1066/PrairieLearn,rbessick5/PrairieLearn,jakebailey/PrairieLearn,jakebailey/PrairieLearn,tbretl/PrairieLearn,rbessick5/PrairieLearn,PrairieLearn/PrairieLearnHack,PrairieLearn/PrairieLearnHack,PrairieLearn/PrairieLearnHack,parasgithub/PrairieLearn,lotrfan/PrairieLearn,lotrfan/PrairieLearn,tbretl/PrairieLearn,rbessick5/PrairieLearn