add optional chaining to fix build

Author: seveibar

.babelrc

@@ -1,5 +1,6 @@
 {
     "presets": [
         [ "react-app", { "absoluteRuntime": false } ]
-    ]
+    ],
+    "plugins": ["@babel/plugin-proposal-optional-chaining"]
 }

package.json

@@ -67,7 +67,7 @@
   "devDependencies": {
     "@babel/cli": "^7.2.3",
     "@babel/core": "^7.2.2",
-    "@babel/plugin-proposal-optional-chaining": "^7.10.4",
+    "@babel/plugin-proposal-optional-chaining": "^7.11.0",
     "@storybook/addon-actions": "^5.3.14",
     "@storybook/addon-links": "^5.3.14",
     "@storybook/addons": "^5.3.14",

yarn.lock

@@ -594,6 +594,13 @@
     "@babel/template" "^7.8.3"
     "@babel/types" "^7.8.3"
 
+"@babel/helper-skip-transparent-expression-wrappers@^7.11.0":
+  version "7.11.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-skip-transparent-expression-wrappers/-/helper-skip-transparent-expression-wrappers-7.11.0.tgz#eec162f112c2f58d3af0af125e3bb57665146729"
+  integrity sha512-0XIdiQln4Elglgjbwo9wuJpL/K7AGCY26kmEt0+pRP0TAj4jjyNq1MjoRvikrTVqKcx4Gysxt4cXvVFXP/JO2Q==
+  dependencies:
+    "@babel/types" "^7.11.0"
+
 "@babel/helper-split-export-declaration@^7.0.0", "@babel/helper-split-export-declaration@^7.4.4":
   version "7.4.4"
   resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.4.4.tgz#ff94894a340be78f53f06af038b205c49d993677"
@@ -896,7 +903,16 @@
     "@babel/helper-plugin-utils" "^7.8.3"
     "@babel/plugin-syntax-optional-chaining" "^7.8.0"
 
-"@babel/plugin-proposal-optional-chaining@^7.10.4", "@babel/plugin-proposal-optional-chaining@^7.9.0":
+"@babel/plugin-proposal-optional-chaining@^7.11.0":
+  version "7.11.0"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-optional-chaining/-/plugin-proposal-optional-chaining-7.11.0.tgz#de5866d0646f6afdaab8a566382fe3a221755076"
+  integrity sha512-v9fZIu3Y8562RRwhm1BbMRxtqZNFmFA2EG+pT2diuU8PT3H6T/KXoZ54KgYisfOFZHV6PfvAiBIZ9Rcz+/JCxA==
+  dependencies:
+    "@babel/helper-plugin-utils" "^7.10.4"
+    "@babel/helper-skip-transparent-expression-wrappers" "^7.11.0"
+    "@babel/plugin-syntax-optional-chaining" "^7.8.0"
+
+"@babel/plugin-proposal-optional-chaining@^7.9.0":
   version "7.10.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-optional-chaining/-/plugin-proposal-optional-chaining-7.10.4.tgz#750f1255e930a1f82d8cdde45031f81a0d0adff7"
   integrity sha512-ZIhQIEeavTgouyMSdZRap4VPPHqJJ3NEs2cuHs5p0erH+iz6khB0qfgU8g7UuJkG88+fBMy23ZiU+nuHvekJeQ==
@@ -2160,6 +2176,15 @@
     lodash "^4.17.19"
     to-fast-properties "^2.0.0"
 
+"@babel/types@^7.11.0":
+  version "7.11.0"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.11.0.tgz#2ae6bf1ba9ae8c3c43824e5861269871b206e90d"
+  integrity sha512-O53yME4ZZI0jO1EVGtF1ePGl0LHirG4P1ibcD80XyzZcKhcMFeCXmh4Xb1ifGBIV233Qg12x4rBfQgA+tmOukA==
+  dependencies:
+    "@babel/helper-validator-identifier" "^7.10.4"
+    lodash "^4.17.19"
+    to-fast-properties "^2.0.0"
+
 "@babel/types@^7.8.3", "@babel/types@^7.8.6", "@babel/types@^7.9.0", "@babel/types@^7.9.5":
   version "7.9.5"
   resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.9.5.tgz#89231f82915a8a566a703b3b20133f73da6b9444"