Add test for the deprecation notice of `lexer`
Add test for the deprecation notice of `lexer`

jirengu/jade,bogus34/jade-vfs,ilovezy/jade,hnag409/jade,jirengu/jade,mrotaru/jade,ridixcr/jade,martindale/jade,cutsin/jade,VeraWei/jade,angrilove/jade,illusionfield/jade,pugjs/pug,cesarmarinhorj/jade,jjz/jade,gexiaowei/jade,gdibble/jade,VANITAX/jade,jadejs/then-jade,Mitrend/jade,Laoujin/jade,Shinchy/jade,colin-h/jade,omixen/jade,Laoujin/jade,webmasteraxe/jade,webskyer/jade,magicdawn/jade,andreytkachenko/jade,tranhieutt/jade,gdibble/jade,Victorgichohi/jade,rajnishyadav321/jade,illusionfield/jade,fredyteheranto/jade,jodytate/jade,gexiaowei/jade,pugjs/jade,modulexcite/jade,pugjs/then-jade,VANITAX/jade,colin-h/jade,coderhaoxin/jade,cgvarela/jade,Mitrend/jade,andreytkachenko/jade,pugjs/then-jade,ceremcem/jade,cutsin/jade,pugjs/jade,modulexcite/jade,mumaoxi/jade,webmasteraxe/jade,pugjs/pug,omixen/jade,muthhus/jade,jadejs/then-jade,angrilove/jade,Shinchy/jade,martindale/jade,webskyer/jade,mumaoxi/jade,hnag409/jade,coderhaoxin/jade,muthhus/jade,cgvarela/jade,angryrobot/jade,bogus34/jade-vfs,fredyteheranto/jade,angryrobot/jade,jjz/jade,harp/jade,rajnishyadav321/jade,cesarmarinhorj/jade,VeraWei/jade,harp/jade,ilovezy/jade,tranhieutt/jade,mrotaru/jade,magicdawn/jade,ridixcr/jade,Victorgichohi/jade,jodytate/jade