Update swagger-ui to 3.21.0

package-lock.json

@@ -399,9 +399,9 @@
       "integrity": "sha1-OUE/7p0CXHSn5ZzuyyN4TMDxfwI="
     },
     "swagger-ui-dist": {
-      "version": "3.20.9",
-      "resolved": "https://registry.npmjs.org/swagger-ui-dist/-/swagger-ui-dist-3.20.9.tgz",
-      "integrity": "sha512-tlDVMtwpvA0QPxyda2paAPVR5UDNZI77LaEn/EZdhHLbmvBHACU3j6CTIV/wZSbc6qhpPdNrTB9dD3EDFue98Q=="
+      "version": "3.21.0",
+      "resolved": "https://registry.npmjs.org/swagger-ui-dist/-/swagger-ui-dist-3.21.0.tgz",
+      "integrity": "sha512-bAhzzpujhSIXdzpSI9b9RpvahC556lxcOIXxt1OOtTIasYodpy94gDlanQl4j7xavmi4nhaGiZ9iBcoFO+wHlA=="
     },
     "tiny-emitter": {
       "version": "2.0.2",

package.json

@@ -2,7 +2,7 @@
   "name": "drf-yasg",
   "dependencies": {
     "redoc": "^2.0.0-rc.2",
-    "swagger-ui-dist": "^3.20.9"
+    "swagger-ui-dist": "^3.21.0"
   },
   "repository": {
     "type": "git",