fix: Silence a 'this will never change' warning

     One of your dependencies, babel-preset-react-app, is importing
     the "@babel/plugin-proposal-private-property-in-object" package
     without declaring it in its dependencies. This is currently
     working because
     "@babel/plugin-proposal-private-property-in-object" is already in
     your node_modules folder for unrelated reasons, but it may break
     at any time.

     babel-preset-react-app is part of the create-react-app project,
     which is not maintianed anymore. It is thus unlikely that this
     bug will ever be fixed. Add
     "@babel/plugin-proposal-private-property-in-object" to your
     devDependencies to work around this error. This will make this
     message go away.

package.json

@@ -51,6 +51,7 @@
   },
   "devDependencies": {
     "@babel/core": "^7.16.0",
+    "@babel/plugin-proposal-private-property-in-object": "^7.21.11",
     "@testing-library/jest-dom": "^5.14.1",
     "@testing-library/react": "12.0.0",
     "babel-eslint": "^10.1.0",

yarn.lock

@@ -112,7 +112,7 @@
     lodash "^4.17.13"
     source-map "^0.5.0"
 
-"@babel/helper-annotate-as-pure@^7.25.9":
+"@babel/helper-annotate-as-pure@^7.18.6", "@babel/helper-annotate-as-pure@^7.25.9":
   version "7.25.9"
   resolved "https://registry.yarnpkg.com/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.25.9.tgz#d8eac4d2dc0d7b6e11fa6e535332e0d3184f06b4"
   integrity sha512-gv7320KBUFJz1RnylIg5WWYPRXKZ884AGkYpgpWW02TH66Dl+HaC1t1CKd0z3R4b6hdYEcmrNZHUmfCP+1u3/g==
@@ -138,7 +138,7 @@
     lru-cache "^5.1.1"
     semver "^6.3.1"
 
-"@babel/helper-create-class-features-plugin@^7.18.6", "@babel/helper-create-class-features-plugin@^7.25.9":
+"@babel/helper-create-class-features-plugin@^7.18.6", "@babel/helper-create-class-features-plugin@^7.21.0", "@babel/helper-create-class-features-plugin@^7.25.9":
   version "7.25.9"
   resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.25.9.tgz#7644147706bb90ff613297d49ed5266bde729f83"
   integrity sha512-UTZQMvt0d/rSz6KI+qdu7GQze5TIajwTS++GUozlw8VBJDEOAqSXwm1WvmYEZwqdqSGQshRocPDqrt4HBZB3fQ==
@@ -490,6 +490,16 @@
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-private-property-in-object/-/plugin-proposal-private-property-in-object-7.21.0-placeholder-for-preset-env.2.tgz#7844f9289546efa9febac2de4cfe358a050bd703"
   integrity sha512-SOSkfJDddaM7mak6cPEpswyTRnuRltl429hMraQEglW+OkovnCzsiszTmsrlY//qLFjCpQDFRvjdm2wA5pPm9w==
 
+"@babel/plugin-proposal-private-property-in-object@^7.21.11":
+  version "7.21.11"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-private-property-in-object/-/plugin-proposal-private-property-in-object-7.21.11.tgz#69d597086b6760c4126525cfa154f34631ff272c"
+  integrity sha512-0QZ8qP/3RLDVBwBFoWAwCtgcDZJVwA5LUJRZU8x2YFfKNuFq161wK3cuGrALu5yiPu+vzwTAg/sMWVNeWeNyaw==
+  dependencies:
+    "@babel/helper-annotate-as-pure" "^7.18.6"
+    "@babel/helper-create-class-features-plugin" "^7.21.0"
+    "@babel/helper-plugin-utils" "^7.20.2"
+    "@babel/plugin-syntax-private-property-in-object" "^7.14.5"
+
 "@babel/plugin-syntax-async-generators@^7.8.4":
   version "7.8.4"
   resolved "https://registry.yarnpkg.com/@babel/plugin-syntax-async-generators/-/plugin-syntax-async-generators-7.8.4.tgz#a983fb1aeb2ec3f6ed042a210f640e90e786fe0d"