removed composer.lock from gitignore
removed composer.lock from gitignore

we should not provide one in the package but developers should commit
them when starting a new project so that all share the same versions
and only explicit composer update command will change that.
Escpecially important when deploying to production.

krissss/yundou,CanDo-com/yii2-app-basic,marianturchyn/yii2-app-basic,githubjeka/yii2-app-basic,OrlandoST/yii2-app-basic,AdeAttwood/Yii2-Basic-Grunt,IngridMendes/boigalera,andreybolonin/yii2-app-basic,themccallister/yii2-app-basic,yiisoft/yii2-app-basic,tiagocardosos/yii2-sample-app-urlshortener-mongo,AdeAttwood/Yii2-Basic-Grunt,wojtonow/yii2-basic,karoldanutama/dev-ops-yii2-app-basic,pana1990/yii2-app-basic,jacmoe/yii2-app-basic-zurbified,tigokr/intermedia_test_0,aerios/dev-ops-yii2-app-basic,fredyns/shippingweight,cbn052293/Test_Yii,DawidMyslak/home-budget,adiferd/dev-ops-yii2-app-basic,matperez/yii2-app-basic-with-environments,tird/yii2-app-basic,IngridMendes/boigalera,alfredleo/yii2-app-basic,hanupas/dev-ops-yii2-app-basic,OrlandoST/instapro,CanDo-com/yii2-app-basic,callmez/yii2-app-wechat,dasscheman/yii2-app-basic,yiisoft/yii2-app-basic,novomirskoy/yii2gallery,wartron/yii2-app-basic-account,matperez/yii2-app-basic-with-environments,OrlandoST/yii2-app-basic,githubjeka/yii2-app-basic,IngridMendes/boigalera,novomirskoy/yii2gallery,dasscheman/yii2-app-basic,DawidMyslak/home-budget,AdeAttwood/Yii2-Basic-Grunt,OrlandoST/instapro,jarioneto/yii2-app-rest,fredyns/shippingweight,jacmoe/yii2-app-basic-zurbified,tigokr/intermedia_test_0,wojtonow/yii2-basic,Vitashev/yii2-app-basic