Upgrade popper.js to 1.15.0 (from 1.14.7)

Author: bdukes

package.json

@@ -60,7 +60,7 @@
     "numeral": "2.0.6",
     "pepjs": "0.5.2",
     "picturefill": "3.0.3",
-    "popper.js": "1.14.7",
+    "popper.js": "1.15.0",
     "pubsub-js": "1.7.0",
     "quill": "1.3.6",
     "respond.js": "1.4.2",

yarn.lock

@@ -4457,10 +4457,10 @@ plugin-error@^1.0.0:
     arr-union "^3.1.0"
     extend-shallow "^3.0.2"
 
-popper.js@1.14.7:
-  version "1.14.7"
-  resolved "https://registry.yarnpkg.com/popper.js/-/popper.js-1.14.7.tgz#e31ec06cfac6a97a53280c3e55e4e0c860e7738e"
-  integrity sha512-4q1hNvoUre/8srWsH7hnoSJ5xVmIL4qgz+s4qf2TnJIMyZFUFMGH+9vE7mXynAlHSZ/NdTmmow86muD0myUkVQ==
+popper.js@1.15.0:
+  version "1.15.0"
+  resolved "https://registry.yarnpkg.com/popper.js/-/popper.js-1.15.0.tgz#5560b99bbad7647e9faa475c6b8056621f5a4ff2"
+  integrity sha512-w010cY1oCUmI+9KwwlWki+r5jxKfTFDVoadl7MSrIujHU5MJ5OR6HTDj6Xo8aoR/QsA56x8jKjA59qGH4ELtrA==
 
 posix-character-classes@^0.1.0:
   version "0.1.1"