[Security] Bump graphql-playground-html from 1.6.20 to 1.6.25

Bumps [graphql-playground-html](https://github.com/graphcool/graphql-playground) from 1.6.20 to 1.6.25. **This update includes a security fix.**
- [Release notes](https://github.com/graphcool/graphql-playground/releases)
- [Commits](https://github.com/graphcool/graphql-playground/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

yarn.lock

@@ -4373,7 +4373,7 @@ commander@4.1.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-4.1.0.tgz#545983a0603fe425bc672d66c9e3c89c42121a83"
   integrity sha512-NIQrwvv9V39FHgGFm36+U9SMQzbiHvU79k+iADraJTpmrFFfx7Ds0IvDoAdZsDrknlkRk14OYoWXb57uTh7/sw==
 
-commander@^2.11.0, commander@^2.20.0:
+commander@^2.11.0, commander@^2.20.0, commander@^2.20.3:
   version "2.20.3"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
   integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
@@ -4899,6 +4899,11 @@ cssesc@^3.0.0:
   resolved "https://registry.yarnpkg.com/cssesc/-/cssesc-3.0.0.tgz#37741919903b868565e1c09ea747445cd18983ee"
   integrity sha512-/Tb/JcjK111nNScGob5MNtsntNM1aCNUDipB/TkwZFhyDrrE47SOx/18wF2bbjgc3ZzCSKW1T5nt5EbFoAz/Vg==
 
+cssfilter@0.0.10:
+  version "0.0.10"
+  resolved "https://registry.yarnpkg.com/cssfilter/-/cssfilter-0.0.10.tgz#c6d2672632a2e5c83e013e6864a42ce8defd20ae"
+  integrity sha1-xtJnJjKi5cg+AT5oZKQs6N79IK4=
+
 cssnano-preset-default@^4.0.7:
   version "4.0.7"
   resolved "https://registry.yarnpkg.com/cssnano-preset-default/-/cssnano-preset-default-4.0.7.tgz#51ec662ccfca0f88b396dcd9679cdb931be17f76"
@@ -7938,9 +7943,11 @@ graphql-import@^0.7.1:
     resolve-from "^4.0.0"
 
 graphql-playground-html@^1.6.19:
-  version "1.6.20"
-  resolved "https://registry.yarnpkg.com/graphql-playground-html/-/graphql-playground-html-1.6.20.tgz#53a6a497ae3252cd1a7d1e96867fd02538c6e6df"
-  integrity sha512-RkC18un0a1YEm0PoTMGgFQh7kIA6mtp3dUun+6coWtuMLczoNNij6V0DPHEj5kWi8u0qIrSKgSx5kh4pxcCX6g==
+  version "1.6.25"
+  resolved "https://registry.yarnpkg.com/graphql-playground-html/-/graphql-playground-html-1.6.25.tgz#2d8fa250cec4036a4f5b7f8ad069c86d6d64c95f"
+  integrity sha512-wMNvGsQ0OwBVhn72VVi7OdpI85IxiIZT43glRx7gQIwQ6NvhFnzMYBIVmcJAJ4UlXRYiWtrQhuOItDXObiR3kg==
+  dependencies:
+    xss "^1.0.6"
 
 graphql-playground-middleware-express@^1.7.15:
   version "1.7.15"
@@ -16044,6 +16051,14 @@ xregexp@^4.3.0:
   dependencies:
     "@babel/runtime-corejs3" "^7.8.3"
 
+xss@^1.0.6:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/xss/-/xss-1.0.7.tgz#a554cbd5e909324bd6893fb47fff441ad54e2a95"
+  integrity sha512-A9v7tblGvxu8TWXQC9rlpW96a+LN1lyw6wyhpTmmGW+FwRMactchBR3ROKSi33UPCUcUHSu8s9YP6F+K3Mw//w==
+  dependencies:
+    commander "^2.20.3"
+    cssfilter "0.0.10"
+
 xstate@^4.10.0:
   version "4.10.0"
   resolved "https://registry.yarnpkg.com/xstate/-/xstate-4.10.0.tgz#f87e4ef593fe40300b8eec50a5d9f0763aa4f622"