Bump react-dom from 16.6.1 to 16.6.3

Bumps [react-dom](https://github.com/facebook/react) from 16.6.1 to 16.6.3.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits)

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

yarn.lock

@@ -5643,14 +5643,14 @@ rc@^1.2.7:
     strip-json-comments "~2.0.1"
 
 react-dom@^16.5.2:
-  version "16.6.1"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.6.1.tgz#5476e08694ae504ae385a28b62ecc4fe3a29add9"
-  integrity sha512-zm+wBuEMGm009Wt1uE4Zw5KcXOW7qC4E/xW/fpJsCsbOco4U/R84u+DzzO/S4SYSdNBcqcaulcp4w3FXl8pImw==
+  version "16.6.3"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.6.3.tgz#8fa7ba6883c85211b8da2d0efeffc9d3825cccc0"
+  integrity sha512-8ugJWRCWLGXy+7PmNh8WJz3g1TaTUt1XyoIcFN+x0Zbkoz+KKdUyx1AQLYJdbFXjuF41Nmjn5+j//rxvhFjgSQ==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
     prop-types "^15.6.2"
-    scheduler "^0.11.0"
+    scheduler "^0.11.2"
 
 react-router-dom@^4.3.1:
   version "4.3.1"
@@ -6050,14 +6050,6 @@ sax@^1.2.4, sax@~1.2.4:
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
   integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
 
-scheduler@^0.11.0:
-  version "0.11.0"
-  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.11.0.tgz#def1f1bfa6550cc57981a87106e65e8aea41a6b5"
-  integrity sha512-MAYbBfmiEHxF0W+c4CxMpEqMYK+rYF584VP/qMKSiHM6lTkBKKYOJaDiSILpJHla6hBOsVd6GucPL46o2Uq3sg==
-  dependencies:
-    loose-envify "^1.1.0"
-    object-assign "^4.1.1"
-
 scheduler@^0.11.2:
   version "0.11.2"
   resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.11.2.tgz#a8db5399d06eba5abac51b705b7151d2319d33d3"