Merge pull request #740 from delebash/master

add tether@1.1.1

package-overrides/github/HubSpot/tether@1.1.1.json

@@ -0,0 +1,11 @@
+{
+  "main": "js/tether",
+  "directories": {
+    "lib": "dist"
+  },
+  "shim": {
+    "js/tether": {
+      "exports": "Tether"
+    }
+  }
+}

package-overrides/github/twbs/bootstrap@4.0.0-alpha.2.json

@@ -18,6 +18,6 @@
   },
   "dependencies": {
     "jquery": "github:components/jquery",
-    "tether": "github:HubSpot/tether"
+    "tether": "github:HubSpot/tether@^1.1.1"
   }
 }