Update dependency antd to v3.15.1

Author: renovate-bot

packages/iiif-redux-demos/package.json

@@ -13,7 +13,7 @@
   },
   "dependencies": {
     "@canvas-panel/viewer-element": "0.1.2",
-    "antd": "3.15.0",
+    "antd": "3.15.1",
     "iiif-redux": "1.0.0",
     "react": "16.8.4",
     "react-dom": "16.8.4",

packages/iiif-redux-tabs/package.json

@@ -13,7 +13,7 @@
   },
   "dependencies": {
     "@canvas-panel/viewer-element": "0.1.2",
-    "antd": "3.15.0",
+    "antd": "3.15.1",
     "chrome-tabs": "4.2.0",
     "iiif-redux": "1.0.0",
     "nwb-sass": "0.9.0",

yarn.lock

@@ -1229,9 +1229,9 @@ ant-design-palettes@^1.1.3:
   dependencies:
     tinycolor2 "^1.4.1"
 
-antd@3.15.0:
-  version "3.15.0"
-  resolved "https://registry.yarnpkg.com/antd/-/antd-3.15.0.tgz#af187ce62902edf261d7251fc9105407527fad9d"
+antd@3.15.1:
+  version "3.15.1"
+  resolved "https://registry.yarnpkg.com/antd/-/antd-3.15.1.tgz#16ce63a2d84a88906e6ece934423871aa67395c5"
   dependencies:
     "@ant-design/icons" "~1.2.0"
     "@ant-design/icons-react" "~1.1.2"