fix(package): update pictograph to version 2.1.5
fix(package): update pictograph to version 2.1.5

Closes #979
ha-dai/Misskey,Tosuke/misskey,syuilo/Misskey,Tosuke/misskey,Tosuke/misskey,Tosuke/misskey,ha-dai/Misskey,Tosuke/misskey,syuilo/Misskey