docs: simplify npm test commands
docs: simplify npm test commands

This removes "node_modules/.bin" from the commands that run karma.

It is not necessary to specify the full path to karma since npm will
automatically add the "node_modules/.bin" directory to the front of
$PATH when it is running scripts.

ernsheong/karma,pmq20/karma,stevemao/karma,patrickporto/karma,gayancliyanage/karma,mprobst/karma,marthinus-engelbrecht/karma,lencioni/karma,KrekkieD/karma,KrekkieD/karma,jamestalmage/karma,youprofit/karma,jjoos/karma,rhlass/karma,simudream/karma,bitwiseman/karma,brianmhunt/karma,shirish87/karma,jamestalmage/karma,codedogfish/karma,lencioni/karma,david-garcia-nete/karma,marthinus-engelbrecht/karma,nmalaguti/karma,powerkid/karma,clbond/karma,patrickporto/karma,bitwiseman/karma,rhlass/karma,Klaudit/karma,gayancliyanage/karma,nmalaguti/karma,xiaoking/karma,clbond/karma,tomkuk/karma,skycocker/karma,ernsheong/karma,stevemao/karma,aiboy/karma,mprobst/karma,wesleycho/karma,oyiptong/karma,simudream/karma,SamuelMarks/karma,youprofit/karma,kahwee/karma,chrisirhc/karma,stevemao/karma,chrisirhc/karma,johnjbarton/karma,jjoos/karma,Sanjo/karma,wesleycho/karma,marthinus-engelbrecht/karma,buley/karma,hitesh97/karma,lencioni/karma,SamuelMarks/karma,Klaudit/karma,clbond/karma,skycocker/karma,pmq20/karma,ernsheong/karma,oyiptong/karma,rhlass/karma,behzad88/karma,hitesh97/karma,jamestalmage/karma,simudream/karma,powerkid/karma,buley/karma,skycocker/karma,buley/karma,jjoos/karma,maksimr/karma,astorije/karma,unional/karma,karma-runner/karma,patrickporto/karma,panrafal/karma,Sanjo/karma,powerkid/karma,harme199497/karma,brianmhunt/karma,vtsvang/karma,panrafal/karma,pedrotcaraujo/karma,behzad88/karma,IveWong/karma,Dignifiedquire/karma,astorije/karma,harme199497/karma,IsaacChapman/karma,patrickporto/karma,david-garcia-nete/karma,wesleycho/karma,IveWong/karma,jamestalmage/karma,tomkuk/karma,Sanjo/karma,maksimr/karma,brianmhunt/karma,codedogfish/karma,harme199497/karma,mprobst/karma,kahwee/karma,shirish87/karma,Dignifiedquire/karma,IsaacChapman/karma,panrafal/karma,karma-runner/karma,Sanjo/karma,Klaudit/karma,oyiptong/karma,johnjbarton/karma,timebackzhou/karma,maksimr/karma,hitesh97/karma,xiaoking/karma,kahwee/karma,karma-runner/karma,youprofit/karma,pedrotcaraujo/karma,stevemao/karma,karma-runner/karma,david-garcia-nete/karma,wesleycho/karma,skycocker/karma,gayancliyanage/karma,timebackzhou/karma,IsaacChapman/karma,marthinus-engelbrecht/karma,timebackzhou/karma,unional/karma,KrekkieD/karma,johnjbarton/karma,kahwee/karma,astorije/karma,aiboy/karma,jjoos/karma,unional/karma,shirish87/karma,harme199497/karma,nmalaguti/karma,pedrotcaraujo/karma,vtsvang/karma,timebackzhou/karma,vtsvang/karma,clbond/karma,unional/karma,nmalaguti/karma,chrisirhc/karma,chrisirhc/karma,tomkuk/karma,aiboy/karma,yandex-lego/karma,simudream/karma,oyiptong/karma,astorije/karma,IsaacChapman/karma,pedrotcaraujo/karma,pmq20/karma,codedogfish/karma,Dignifiedquire/karma,behzad88/karma,buley/karma,codedogfish/karma,Dignifiedquire/karma,powerkid/karma,Klaudit/karma,yandex-lego/karma,SamuelMarks/karma,brianmhunt/karma,KrekkieD/karma,pmq20/karma,yandex-lego/karma,xiaoking/karma,johnjbarton/karma,aiboy/karma,youprofit/karma,vtsvang/karma,xiaoking/karma,tomkuk/karma,IveWong/karma,bitwiseman/karma,gayancliyanage/karma,IveWong/karma,hitesh97/karma,rhlass/karma