build(package.json): Fix bootstrap-switch version to 3.3.4

A version of bootstrap-switch that is "approximately equivalent" to 3.3.4 is breaking a Patternfly
unit test in Travis CI. TO fix this, we change the package.json specification for the version of
this dependency from "~3.3.4" to "3.3.4"

Author: ddelabru

package.json

@@ -71,7 +71,7 @@
     "bootstrap-sass": "^3.4.0",
     "bootstrap-select": "1.12.2",
     "bootstrap-slider": "^9.9.0",
-    "bootstrap-switch": "~3.3.4",
+    "bootstrap-switch": "3.3.4",
     "bootstrap-touchspin": "~3.1.1",
     "c3": "~0.4.11",
     "d3": "~3.5.17",