upgrade React.js packages

package.json

@@ -5,8 +5,8 @@
   "dependencies": {
     "diff": "^4.0.1",
     "prismjs": "^1.15.0",
-    "react": "^16.8.0-alpha.1",
-    "react-dom": "^16.8.0-alpha.1",
+    "react": "^16.8.1",
+    "react-dom": "^16.8.1",
     "react-scripts": "2.1.3",
     "react-use": "^5.2.2"
   },

yarn.lock

@@ -8021,15 +8021,15 @@ react-dev-utils@^7.0.1:
     strip-ansi "4.0.0"
     text-table "0.2.0"
 
-react-dom@^16.8.0-alpha.1:
-  version "16.8.0-alpha.1"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.8.0-alpha.1.tgz#dab73b8354ba2e498e3127d18e29d4546cea889e"
-  integrity sha512-tZCUM8BpnwUHJmLnUWP9c3vVZxnCqYotj7s4tx7umojG6BKv745KIBtuPTzt0EI0q50GMLEpmT/CPQ8iA61TwQ==
+react-dom@^16.8.1:
+  version "16.8.1"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.8.1.tgz#ec860f98853d09d39bafd3a6f1e12389d283dbb4"
+  integrity sha512-N74IZUrPt6UiDjXaO7UbDDFXeUXnVhZzeRLy/6iqqN1ipfjrhR60Bp5NuBK+rv3GMdqdIuwIl22u1SYwf330bg==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
     prop-types "^15.6.2"
-    scheduler "^0.13.0-alpha.1"
+    scheduler "^0.13.1"
 
 react-error-overlay@^5.1.2:
   version "5.1.2"
@@ -8111,15 +8111,15 @@ react-wait@^0.3.0:
   resolved "https://registry.yarnpkg.com/react-wait/-/react-wait-0.3.0.tgz#0cdd4d919012451a5bc3ab0a16d00c6fd9a8c10b"
   integrity sha512-kB5x/kMKWcn0uVr9gBdNz21/oGbQwEQnF3P9p6E9yLfJ9DRcKS0fagbgYMFI0YFOoyKDj+2q6Rwax0kTYJF37g==
 
-react@^16.8.0-alpha.1:
-  version "16.8.0-alpha.1"
-  resolved "https://registry.yarnpkg.com/react/-/react-16.8.0-alpha.1.tgz#c2b32689f3b466d3ce85a634dd9035f789d2cd97"
-  integrity sha512-vLwwnhM2dXrCsiQmcSxF2UdZVV5xsiXjK5Yetmy8dVqngJhQ3aw3YJhZN/YmyonxwdimH40wVqFQfsl4gSu2RA==
+react@^16.8.1:
+  version "16.8.1"
+  resolved "https://registry.yarnpkg.com/react/-/react-16.8.1.tgz#ae11831f6cb2a05d58603a976afc8a558e852c4a"
+  integrity sha512-wLw5CFGPdo7p/AgteFz7GblI2JPOos0+biSoxf1FPsGxWQZdN/pj6oToJs1crn61DL3Ln7mN86uZ4j74p31ELQ==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
     prop-types "^15.6.2"
-    scheduler "^0.13.0-alpha.1"
+    scheduler "^0.13.1"
 
 read-pkg-up@^1.0.1:
   version "1.0.1"
@@ -8594,10 +8594,10 @@ saxes@^3.1.4:
   dependencies:
     xmlchars "^1.3.1"
 
-scheduler@^0.13.0-alpha.1:
-  version "0.13.0-alpha.1"
-  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.13.0-alpha.1.tgz#753977fb4fb35d8cdd559868a11e46b640955556"
-  integrity sha512-W0sH0848sVuPKg+I18vTYQyzVtA4X1lrVgSeXK6KnOPUltFdJcY5nkbTkjGUeS/E0x+eBsNYfSdhJtGjT95njw==
+scheduler@^0.13.1:
+  version "0.13.1"
+  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.13.1.tgz#1a217df1bfaabaf4f1b92a9127d5d732d85a9591"
+  integrity sha512-VJKOkiKIN2/6NOoexuypwSrybx13MY7NSy9RNt8wPvZDMRT1CW6qlpF5jXRToXNHz3uWzbm2elNpZfXfGPqP9A==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"