chore(bootstrap-select): update package.json to lock in 1.12.2

Author: Amineta Lo

package.json

@@ -66,7 +66,7 @@
   "optionalDependencies": {
     "bootstrap-datepicker": "^1.7.1",
     "bootstrap-sass": "^3.3.7",
-    "bootstrap-select": "^1.12.2",
+    "bootstrap-select": "1.12.2",
     "bootstrap-slider": "^9.9.0",
     "bootstrap-switch": "~3.3.4",
     "bootstrap-touchspin": "~3.1.1",