diff --git a/packages/react-scripts/package.json b/packages/react-scripts/package.json
index dd20d74..14bf7b1 100644
--- a/packages/react-scripts/package.json
+++ b/packages/react-scripts/package.json
@@ -42,7 +42,7 @@
     "eslint-plugin-flowtype": "2.39.1",
     "eslint-plugin-import": "2.8.0",
     "eslint-plugin-jsx-a11y": "5.1.1",
-    "eslint-plugin-react": "7.4.0",
+    "eslint-plugin-react": "7.18.3",
     "extract-text-webpack-plugin": "3.0.2",
     "file-loader": "1.1.5",
     "fs-extra": "3.0.1",
diff --git a/yarn.lock b/yarn.lock
index e98338c..9a8c37d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -211,6 +211,14 @@ array-includes@^3.0.3:
     define-properties "^1.1.2"
     es-abstract "^1.7.0"
 
+array-includes@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/array-includes/-/array-includes-3.1.1.tgz#cdd67e6852bdf9c1215460786732255ed2459348"
+  dependencies:
+    define-properties "^1.1.3"
+    es-abstract "^1.17.0"
+    is-string "^1.0.5"
+
 array-map@~0.0.0:
   version "0.0.0"
   resolved "https://registry.npmjs.org/array-map/-/array-map-0.0.0.tgz#88a2bab73d1cf7bcd5c1b118a003f66f665fa662"
@@ -1986,6 +1994,12 @@ define-properties@^1.1.2:
     foreach "^2.0.5"
     object-keys "^1.0.8"
 
+define-properties@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/define-properties/-/define-properties-1.1.3.tgz#cf88da6cbee26fe6db7094f61d870cbd84cee9f1"
+  dependencies:
+    object-keys "^1.0.12"
+
 defined@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/defined/-/defined-1.0.0.tgz#c98d9bcef75674188e110969151199e39b1fa693"
@@ -2100,6 +2114,12 @@ doctrine@^2.0.0:
     esutils "^2.0.2"
     isarray "^1.0.0"
 
+doctrine@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-2.1.0.tgz#5cd01fc101621b42c4cd7f5d1a66243716d3f39d"
+  dependencies:
+    esutils "^2.0.2"
+
 dom-converter@~0.1:
   version "0.1.4"
   resolved "https://registry.npmjs.org/dom-converter/-/dom-converter-0.1.4.tgz#a45ef5727b890c9bffe6d7c876e7b19cb0e17f3b"
@@ -2239,6 +2259,22 @@ error-ex@^1.2.0, error-ex@^1.3.1:
   dependencies:
     is-arrayish "^0.2.1"
 
+es-abstract@^1.17.0, es-abstract@^1.17.0-next.1:
+  version "1.17.4"
+  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.17.4.tgz#e3aedf19706b20e7c2594c35fc0d57605a79e184"
+  dependencies:
+    es-to-primitive "^1.2.1"
+    function-bind "^1.1.1"
+    has "^1.0.3"
+    has-symbols "^1.0.1"
+    is-callable "^1.1.5"
+    is-regex "^1.0.5"
+    object-inspect "^1.7.0"
+    object-keys "^1.1.1"
+    object.assign "^4.1.0"
+    string.prototype.trimleft "^2.1.1"
+    string.prototype.trimright "^2.1.1"
+
 es-abstract@^1.7.0:
   version "1.9.0"
   resolved "https://registry.npmjs.org/es-abstract/-/es-abstract-1.9.0.tgz#690829a07cae36b222e7fd9b75c0d0573eb25227"
@@ -2257,6 +2293,14 @@ es-to-primitive@^1.1.1:
     is-date-object "^1.0.1"
     is-symbol "^1.0.1"
 
+es-to-primitive@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/es-to-primitive/-/es-to-primitive-1.2.1.tgz#e55cd4c9cdc188bcefb03b366c736323fc5c898a"
+  dependencies:
+    is-callable "^1.1.4"
+    is-date-object "^1.0.1"
+    is-symbol "^1.0.2"
+
 es5-ext@^0.10.14, es5-ext@^0.10.35, es5-ext@^0.10.9, es5-ext@~0.10.14:
   version "0.10.35"
   resolved "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.35.tgz#18ee858ce6a3c45c7d79e91c15fcca9ec568494f"
@@ -2402,14 +2446,20 @@ eslint-plugin-jsx-a11y@5.1.1:
     emoji-regex "^6.1.0"
     jsx-ast-utils "^1.4.0"
 
-eslint-plugin-react@7.4.0:
-  version "7.4.0"
-  resolved "https://registry.npmjs.org/eslint-plugin-react/-/eslint-plugin-react-7.4.0.tgz#300a95861b9729c087d362dd64abcc351a74364a"
-  dependencies:
-    doctrine "^2.0.0"
-    has "^1.0.1"
-    jsx-ast-utils "^2.0.0"
-    prop-types "^15.5.10"
+eslint-plugin-react@7.18.3:
+  version "7.18.3"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-react/-/eslint-plugin-react-7.18.3.tgz#8be671b7f6be095098e79d27ac32f9580f599bc8"
+  dependencies:
+    array-includes "^3.1.1"
+    doctrine "^2.1.0"
+    has "^1.0.3"
+    jsx-ast-utils "^2.2.3"
+    object.entries "^1.1.1"
+    object.fromentries "^2.0.2"
+    object.values "^1.1.1"
+    prop-types "^15.7.2"
+    resolve "^1.14.2"
+    string.prototype.matchall "^4.0.2"
 
 eslint-scope@^3.7.1:
   version "3.7.1"
@@ -3138,6 +3188,10 @@ has-flag@^2.0.0:
   version "2.0.0"
   resolved "https://registry.npmjs.org/has-flag/-/has-flag-2.0.0.tgz#e8207af1cc7b30d446cc70b734b5e8be18f88d51"
 
+has-symbols@^1.0.0, has-symbols@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/has-symbols/-/has-symbols-1.0.1.tgz#9f5214758a44196c406d9bd76cebf81ec2dd31e8"
+
 has-unicode@^2.0.0:
   version "2.0.1"
   resolved "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.1.tgz#e0e6fe6a28cf51138855e086d1691e771de2a8b9"
@@ -3148,6 +3202,12 @@ has@^1.0.1:
   dependencies:
     function-bind "^1.0.2"
 
+has@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/has/-/has-1.0.3.tgz#722d7cbfc1f6aa8241f16dd814e011e1f41e8796"
+  dependencies:
+    function-bind "^1.1.1"
+
 hash-base@^2.0.0:
   version "2.0.2"
   resolved "https://registry.npmjs.org/hash-base/-/hash-base-2.0.2.tgz#66ea1d856db4e8a5470cadf6fce23ae5244ef2e1"
@@ -3423,6 +3483,14 @@ internal-ip@1.2.0:
   dependencies:
     meow "^3.3.0"
 
+internal-slot@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/internal-slot/-/internal-slot-1.0.2.tgz#9c2e9fb3cd8e5e4256c6f45fe310067fcfa378a3"
+  dependencies:
+    es-abstract "^1.17.0-next.1"
+    has "^1.0.3"
+    side-channel "^1.0.2"
+
 interpret@^1.0.0:
   version "1.0.4"
   resolved "https://registry.npmjs.org/interpret/-/interpret-1.0.4.tgz#820cdd588b868ffb191a809506d6c9c8f212b1b0"
@@ -3473,6 +3541,10 @@ is-callable@^1.1.1, is-callable@^1.1.3:
   version "1.1.3"
   resolved "https://registry.npmjs.org/is-callable/-/is-callable-1.1.3.tgz#86eb75392805ddc33af71c92a0eedf74ee7604b2"
 
+is-callable@^1.1.4, is-callable@^1.1.5:
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.5.tgz#f7e46b596890456db74e7f6e976cb3273d06faab"
+
 is-ci@^1.0.10:
   version "1.0.10"
   resolved "https://registry.npmjs.org/is-ci/-/is-ci-1.0.10.tgz#f739336b2632365061a9d48270cd56ae3369318e"
@@ -3599,6 +3671,12 @@ is-regex@^1.0.4:
   dependencies:
     has "^1.0.1"
 
+is-regex@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.0.5.tgz#39d589a358bf18967f726967120b8fc1aed74eae"
+  dependencies:
+    has "^1.0.3"
+
 is-resolvable@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/is-resolvable/-/is-resolvable-1.0.0.tgz#8df57c61ea2e3c501408d100fb013cf8d6e0cc62"
@@ -3617,6 +3695,10 @@ is-stream@^1.0.0, is-stream@^1.0.1, is-stream@^1.1.0:
   version "1.1.0"
   resolved "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
 
+is-string@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/is-string/-/is-string-1.0.5.tgz#40493ed198ef3ff477b8c7f92f644ec82a5cd3a6"
+
 is-subset@^0.1.1:
   version "0.1.1"
   resolved "https://registry.npmjs.org/is-subset/-/is-subset-0.1.1.tgz#8a59117d932de1de00f245fcdd39ce43f1e939a6"
@@ -3631,6 +3713,12 @@ is-symbol@^1.0.1:
   version "1.0.1"
   resolved "https://registry.npmjs.org/is-symbol/-/is-symbol-1.0.1.tgz#3cc59f00025194b6ab2e38dbae6689256b660572"
 
+is-symbol@^1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.3.tgz#38e1014b9e6329be0de9d24a414fd7441ec61937"
+  dependencies:
+    has-symbols "^1.0.1"
+
 is-text-path@^1.0.0:
   version "1.0.1"
   resolved "https://registry.npmjs.org/is-text-path/-/is-text-path-1.0.1.tgz#4e1aa0fb51bfbcb3e92688001397202c1775b66e"
@@ -3964,6 +4052,10 @@ js-tokens@^3.0.0, js-tokens@^3.0.2:
   version "3.0.2"
   resolved "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
 
+"js-tokens@^3.0.0 || ^4.0.0":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
+
 js-yaml@^3.4.3, js-yaml@^3.7.0, js-yaml@^3.9.1:
   version "3.10.0"
   resolved "https://registry.npmjs.org/js-yaml/-/js-yaml-3.10.0.tgz#2e78441646bd4682e963f22b6e92823c309c62dc"
@@ -4087,11 +4179,12 @@ jsx-ast-utils@^1.4.0:
   version "1.4.1"
   resolved "https://registry.npmjs.org/jsx-ast-utils/-/jsx-ast-utils-1.4.1.tgz#3867213e8dd79bf1e8f2300c0cfc1efb182c0df1"
 
-jsx-ast-utils@^2.0.0:
-  version "2.0.1"
-  resolved "https://registry.npmjs.org/jsx-ast-utils/-/jsx-ast-utils-2.0.1.tgz#e801b1b39985e20fffc87b40e3748080e2dcac7f"
+jsx-ast-utils@^2.2.3:
+  version "2.2.3"
+  resolved "https://registry.yarnpkg.com/jsx-ast-utils/-/jsx-ast-utils-2.2.3.tgz#8a9364e402448a3ce7f14d357738310d9248054f"
   dependencies:
     array-includes "^3.0.3"
+    object.assign "^4.1.0"
 
 kind-of@^3.0.2:
   version "3.2.2"
@@ -4302,6 +4395,12 @@ loose-envify@^1.0.0, loose-envify@^1.1.0, loose-envify@^1.3.1:
   dependencies:
     js-tokens "^3.0.0"
 
+loose-envify@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.4.0.tgz#71ee51fa7be4caec1a63839f7e682d8132d30caf"
+  dependencies:
+    js-tokens "^3.0.0 || ^4.0.0"
+
 loud-rejection@^1.0.0:
   version "1.6.0"
   resolved "https://registry.npmjs.org/loud-rejection/-/loud-rejection-1.6.0.tgz#5b46f80147edee578870f086d04821cf998e551f"
@@ -4690,10 +4789,45 @@ object-hash@^1.1.4:
   version "1.2.0"
   resolved "https://registry.npmjs.org/object-hash/-/object-hash-1.2.0.tgz#e96af0e96981996a1d47f88ead8f74f1ebc4422b"
 
+object-inspect@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.7.0.tgz#f4f6bd181ad77f006b5ece60bd0b6f398ff74a67"
+
+object-keys@^1.0.11, object-keys@^1.0.12, object-keys@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.1.1.tgz#1c47f272df277f3b1daf061677d9c82e2322c60e"
+
 object-keys@^1.0.8:
   version "1.0.11"
   resolved "https://registry.npmjs.org/object-keys/-/object-keys-1.0.11.tgz#c54601778ad560f1142ce0e01bcca8b56d13426d"
 
+object.assign@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/object.assign/-/object.assign-4.1.0.tgz#968bf1100d7956bb3ca086f006f846b3bc4008da"
+  dependencies:
+    define-properties "^1.1.2"
+    function-bind "^1.1.1"
+    has-symbols "^1.0.0"
+    object-keys "^1.0.11"
+
+object.entries@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/object.entries/-/object.entries-1.1.1.tgz#ee1cf04153de02bb093fec33683900f57ce5399b"
+  dependencies:
+    define-properties "^1.1.3"
+    es-abstract "^1.17.0-next.1"
+    function-bind "^1.1.1"
+    has "^1.0.3"
+
+object.fromentries@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/object.fromentries/-/object.fromentries-2.0.2.tgz#4a09c9b9bb3843dd0f89acdb517a794d4f355ac9"
+  dependencies:
+    define-properties "^1.1.3"
+    es-abstract "^1.17.0-next.1"
+    function-bind "^1.1.1"
+    has "^1.0.3"
+
 object.omit@^2.0.0:
   version "2.0.1"
   resolved "https://registry.npmjs.org/object.omit/-/object.omit-2.0.1.tgz#1a9c744829f39dbb858c76ca3579ae2a54ebd1fa"
@@ -4701,6 +4835,15 @@ object.omit@^2.0.0:
     for-own "^0.1.4"
     is-extendable "^0.1.1"
 
+object.values@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/object.values/-/object.values-1.1.1.tgz#68a99ecde356b7e9295a3c5e0ce31dc8c953de5e"
+  dependencies:
+    define-properties "^1.1.3"
+    es-abstract "^1.17.0-next.1"
+    function-bind "^1.1.1"
+    has "^1.0.3"
+
 obuf@^1.0.0, obuf@^1.1.1:
   version "1.1.1"
   resolved "https://registry.npmjs.org/obuf/-/obuf-1.1.1.tgz#104124b6c602c6796881a042541d36db43a5264e"
@@ -4908,6 +5051,10 @@ path-parse@^1.0.5:
   version "1.0.5"
   resolved "https://registry.npmjs.org/path-parse/-/path-parse-1.0.5.tgz#3c1adf871ea9cd6c9431b6ea2bd74a0ff055c4c1"
 
+path-parse@^1.0.6:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
+
 path-to-regexp@0.1.7:
   version "0.1.7"
   resolved "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz#df604178005f522f15eb4490e7247a1bfaa67f8c"
@@ -5334,7 +5481,7 @@ promise@^7.1.1:
   dependencies:
     asap "~2.0.3"
 
-prop-types@^15.5.10, prop-types@^15.6.0:
+prop-types@^15.6.0:
   version "15.6.0"
   resolved "https://registry.npmjs.org/prop-types/-/prop-types-15.6.0.tgz#ceaf083022fc46b4a35f69e13ef75aed0d639856"
   dependencies:
@@ -5342,6 +5489,14 @@ prop-types@^15.5.10, prop-types@^15.6.0:
     loose-envify "^1.3.1"
     object-assign "^4.1.1"
 
+prop-types@^15.7.2:
+  version "15.7.2"
+  resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.7.2.tgz#52c41e75b8c87e72b9d9360e0206b99dcbffa6c5"
+  dependencies:
+    loose-envify "^1.4.0"
+    object-assign "^4.1.1"
+    react-is "^16.8.1"
+
 proxy-addr@~2.0.2:
   version "2.0.2"
   resolved "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.2.tgz#6571504f47bb988ec8180253f85dd7e14952bdec"
@@ -5487,6 +5642,10 @@ react-error-overlay@^3.0.0:
   version "3.0.0"
   resolved "https://registry.npmjs.org/react-error-overlay/-/react-error-overlay-3.0.0.tgz#c2bc8f4d91f1375b3dad6d75265d51cd5eeaf655"
 
+react-is@^16.8.1:
+  version "16.12.0"
+  resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.12.0.tgz#2cc0fe0fba742d97fd527c42a13bec4eeb06241c"
+
 react@^16.0.0:
   version "16.0.0"
   resolved "https://registry.npmjs.org/react/-/react-16.0.0.tgz#ce7df8f1941b036f02b2cca9dbd0cb1f0e855e2d"
@@ -5618,6 +5777,13 @@ regex-cache@^0.4.2:
   dependencies:
     is-equal-shallow "^0.1.3"
 
+regexp.prototype.flags@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/regexp.prototype.flags/-/regexp.prototype.flags-1.3.0.tgz#7aba89b3c13a64509dabcf3ca8d9fbb9bdf5cb75"
+  dependencies:
+    define-properties "^1.1.3"
+    es-abstract "^1.17.0-next.1"
+
 regexpu-core@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/regexpu-core/-/regexpu-core-1.0.0.tgz#86a763f58ee4d7c2f6b102e4764050de7ed90c6b"
@@ -5791,6 +5957,12 @@ resolve@1.1.7:
   version "1.1.7"
   resolved "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz#203114d82ad2c5ed9e8e0411b3932875e889e97b"
 
+resolve@^1.14.2:
+  version "1.15.1"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.15.1.tgz#27bdcdeffeaf2d6244b95bb0f9f4b4653451f3e8"
+  dependencies:
+    path-parse "^1.0.6"
+
 resolve@^1.2.0, resolve@^1.3.2:
   version "1.5.0"
   resolved "https://registry.npmjs.org/resolve/-/resolve-1.5.0.tgz#1f09acce796c9a762579f31b2c1cc4c3cddf9f36"
@@ -5978,6 +6150,13 @@ shellwords@^0.1.0:
   version "0.1.1"
   resolved "https://registry.npmjs.org/shellwords/-/shellwords-0.1.1.tgz#d6b9181c1a48d397324c84871efbcfc73fc0654b"
 
+side-channel@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/side-channel/-/side-channel-1.0.2.tgz#df5d1abadb4e4bf4af1cd8852bf132d2f7876947"
+  dependencies:
+    es-abstract "^1.17.0-next.1"
+    object-inspect "^1.7.0"
+
 signal-exit@^3.0.0, signal-exit@^3.0.2:
   version "3.0.2"
   resolved "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
@@ -6179,6 +6358,31 @@ string-width@^2.0.0, string-width@^2.1.0, string-width@^2.1.1:
     is-fullwidth-code-point "^2.0.0"
     strip-ansi "^4.0.0"
 
+string.prototype.matchall@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/string.prototype.matchall/-/string.prototype.matchall-4.0.2.tgz#48bb510326fb9fdeb6a33ceaa81a6ea04ef7648e"
+  dependencies:
+    define-properties "^1.1.3"
+    es-abstract "^1.17.0"
+    has-symbols "^1.0.1"
+    internal-slot "^1.0.2"
+    regexp.prototype.flags "^1.3.0"
+    side-channel "^1.0.2"
+
+string.prototype.trimleft@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/string.prototype.trimleft/-/string.prototype.trimleft-2.1.1.tgz#9bdb8ac6abd6d602b17a4ed321870d2f8dcefc74"
+  dependencies:
+    define-properties "^1.1.3"
+    function-bind "^1.1.1"
+
+string.prototype.trimright@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/string.prototype.trimright/-/string.prototype.trimright-2.1.1.tgz#440314b15996c866ce8a0341894d45186200c5d9"
+  dependencies:
+    define-properties "^1.1.3"
+    function-bind "^1.1.1"
+
 string_decoder@^0.10.25, string_decoder@~0.10.x:
   version "0.10.31"
   resolved "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"