chore: Upgrade and consolidate @types/react (#22710)

We used to only inherit it transitively via @types/prop-types, but a lot
of typings actually need it.

This will helps us pull the latest @type/reach__router package, which
(only implicitly, unfortuately) depends on more recent react types than
the ones we have.

For example, helps in #22563.

package.json

@@ -18,6 +18,7 @@
     "@types/lodash": "^4.14.149",
     "@types/node": "^12.12.30",
     "@types/node-fetch": "^2.5.5",
+    "@types/react": "^16.9.31",
     "@types/stack-trace": "^0.0.29",
     "@types/webpack": "^4.41.7",
     "@typescript-eslint/eslint-plugin": "^2.24.0",

yarn.lock

@@ -4052,10 +4052,9 @@
   integrity sha512-Oh7wnvVUCtVIWnCHQWe9qDZKn0fGyk5AMq99jXml0x39K59P+z9qe31CNRtop9TceCpS7NmoK+J9eGeCnyFgnw==
 
 "@types/prop-types@*":
-  version "15.5.5"
-  resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.5.5.tgz#17038dd322c2325f5da650a94d5f9974943625e3"
-  dependencies:
-    "@types/react" "*"
+  version "15.7.3"
+  resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.7.3.tgz#2ab0d5da2e5815f94b0b9d4b95d1e5f243ab2ca7"
+  integrity sha512-KfRL3PuHmqQLOG+2tGpRO26Ctg+Cq1E01D2DMriKEATHgWLfeNDmq9e29Q9WIky0dQ3NPkd1mzYH8Lm936Z9qw==
 
 "@types/q@^1.5.1":
   version "1.5.2"
@@ -4081,9 +4080,10 @@
   dependencies:
     "@types/react" "*"
 
-"@types/react@*":
-  version "16.8.8"
-  resolved "https://registry.yarnpkg.com/@types/react/-/react-16.8.8.tgz#4b60a469fd2469f7aa6eaa0f8cfbc51f6d76e662"
+"@types/react@*", "@types/react@^16.9.31":
+  version "16.9.31"
+  resolved "https://registry.yarnpkg.com/@types/react/-/react-16.9.31.tgz#6a543529766c8934ec8a89667376c2e73e9e2636"
+  integrity sha512-NpYJpNMWScFXtx3A2BJMeew2G3+9SEslVWMdxNJ6DLvxIuxWjY1bizK9q5Y1ujhln31vtjmhjOAYDr9Xx3k9FQ==
   dependencies:
     "@types/prop-types" "*"
     csstype "^2.2.0"
@@ -8056,7 +8056,12 @@ cssstyle@^2.2.0:
   dependencies:
     cssom "~0.3.6"
 
-csstype@^2.2.0, csstype@^2.5.7:
+csstype@^2.2.0:
+  version "2.6.10"
+  resolved "https://registry.yarnpkg.com/csstype/-/csstype-2.6.10.tgz#e63af50e66d7c266edb6b32909cfd0aabe03928b"
+  integrity sha512-D34BqZU4cIlMCY93rZHbrq9pjTAQJ3U8S8rfBqjwHxkGPThWFjzZDQpgMJY0QViLxth6ZKYiwFBo14RdN44U/w==
+
+csstype@^2.5.7:
   version "2.6.5"
   resolved "https://registry.yarnpkg.com/csstype/-/csstype-2.6.5.tgz#1cd1dff742ebf4d7c991470ae71e12bb6751e034"
   integrity sha512-JsTaiksRsel5n7XwqPAfB0l3TFKdpjW/kgAELf9vrb5adGA7UCPLajKK5s3nFrcFm3Rkyp/Qkgl73ENc1UY3cA==