hold yii2-imperavi-widget to 1.1.x branch

we want to be stable and predictable
update composer.lock

more stability

* remove unneeded dependency - smottt/wideimage
* stable updates
    * bower-asset/jquery 2.1.2
    * vova07/yii2-imperavi-widget 1.1.6
    * devgroup/yii2-ace-widget v1.0.0
    * devgroup/yii2-jsoneditor v1.0.0
    * devgroup/yii2-dropzone v1.0.0
    * elasticsearch/elasticsearch v1.3.2
* new dependency bower-asset/slick-carousel 1.3.15
* non-stable updates
    * yiisoft/yii2
    * monolog/monolog
    * symfony/dom-crawler
    * symfony/browser-kit
    * kartik-v/yii2-krajee-base
    * kartik-v/bootstrap-fileinput
    * kartik-v/yii2-grid
    * yiisoft/yii2-debug
    * symfony/event-dispatcher
    * yiisoft/yii2-gii