[ImgBot] optimizes images

*Total -- 21.96kb -> 15.28kb (30.39%)

/src/assets/no-image.png -- 6.90kb -> 1.89kb (72.6%)
/src/assets/placeholder.png -- 2.46kb -> 1.30kb (47.02%)
/favicons/android-chrome-256x256.png -- 3.33kb -> 3.13kb (6.27%)
/favicons/mstile-150x150.png -- 2.80kb -> 2.68kb (4.53%)
/favicons/android-chrome-192x192.png -- 2.59kb -> 2.50kb (3.43%)
/favicons/apple-touch-icon.png -- 2.53kb -> 2.45kb (3.16%)
/favicons/favicon-32x32.png -- 1.34kb -> 1.34kb (0.07%)

package.json

@@ -16,7 +16,7 @@
     "debounce": "^1.0.0",
     "express": "^4.16.1",
     "numeral": "^2.0.4",
-    "vue": "^2.5.17",
+    "vue": "^2.1.0",
     "vue-axios": "^1.2.2",
     "vue-data-tablee": "^0.12.1",
     "vue-js-modal": "^1.3.16",