basis.template: some fixes in tokenizer
basis.template: some fixes in tokenizer

- returns range for whole tag not for open tag only
- return `warns: false` instead of no property at all

basisjs/basisjs,istrel/basisjs,basisjs/basisjs,basisjs/basisjs,istrel/basisjs,istrel/basisjs,fateevv/basisjs,fateevv/basisjs,fateevv/basisjs,tyanas/basisjs,tyanas/basisjs,tyanas/basisjs,smelukov/basisjs,smelukov/basisjs,smelukov/basisjs