[Snyk] Security upgrade react-scripts from 4.0.0 to 5.0.0

[littleflute]

Snyk has created this PR to fix 45 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• i/60/myfirstreact/package.json
• i/60/myfirstreact/package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Improper Verification of Cryptographic Signature SNYK-JS-ELLIPTIC-8187303	786
	Regular Expression Denial of Service (ReDoS) SNYK-JS-CROSSSPAWN-8303230	756
	Denial of Service (DoS) SNYK-JS-HTTPPROXYMIDDLEWARE-8229906	756
	Remote Code Execution (RCE) SNYK-JS-EJS-2803307	726
	Server-side Request Forgery (SSRF) SNYK-JS-IP-12704893	716
	Server-side Request Forgery (SSRF) SNYK-JS-IP-12761655	716
	Regular Expression Denial of Service (ReDoS) SNYK-JS-ANSIHTML-1296849	696
	Excessive Platform Resource Consumption within a Loop SNYK-JS-BRACES-6838727	696
	Denial of Service (DoS) SNYK-JS-DECODEURICOMPONENT-3149970	696
	Regular Expression Denial of Service (ReDoS) SNYK-JS-NTHCHECK-1586032	696
	Regular Expression Denial of Service (ReDoS) SNYK-JS-SEMVER-3247795	696
	Regular Expression Denial of Service (ReDoS) SNYK-JS-TMPL-1583443	696
	Path Traversal SNYK-JS-WEBPACKDEVMIDDLEWARE-6476555	691
	Code Injection SNYK-JS-LODASHTEMPLATE-1088054	681
	Interpretation Conflict SNYK-JS-NODEFORGE-14114940	679
	Uncontrolled Recursion SNYK-JS-NODEFORGE-14125745	649
	Server-Side Request Forgery (SSRF) SNYK-JS-IP-7148531	646
	Missing Release of Resource after Effective Lifetime SNYK-JS-INFLIGHT-6095116	631
	Cross-site Scripting (XSS) SNYK-JS-SERIALIZEJAVASCRIPT-6147607	626
	Remote Code Execution (RCE) SNYK-JS-SHELLQUOTE-1766506	619
	Cross-site Scripting (XSS) SNYK-JS-WEBPACK-7840298	616
	Prototype Pollution SNYK-JS-IMMER-1540542	601
	Prototype Pollution SNYK-JS-LOADERUTILS-3043105	589
	Prototype Pollution SNYK-JS-UNSETVALUE-2400660	589
	Regular Expression Denial of Service (ReDoS) SNYK-JS-BROWSERSLIST-1090194	586
	Improper Control of Dynamically-Managed Code Resources SNYK-JS-EJS-6689533	586
	Regular Expression Denial of Service (ReDoS) SNYK-JS-GLOBPARENT-1016905	586
	Open Redirect SNYK-JS-NODEFORGE-2330875	586
	Regular Expression Denial of Service (ReDoS) SNYK-JS-PATHPARSE-1077067	586
	Improper Verification of Cryptographic Signature SNYK-JS-NODEFORGE-2430339	579
	Cross-site Scripting (XSS) SNYK-JS-ROLLUP-8073097	576
	Prototype Pollution SNYK-JS-JSYAML-13961110	559
	Integer Overflow or Wraparound SNYK-JS-NODEFORGE-14125097	529
	Prototype Pollution SNYK-JS-NODEFORGE-2331908	529
	Arbitrary Code Injection SNYK-JS-EJS-1049328	526
	Prototype Pollution SNYK-JS-MINIMIST-2429795	506
	Improper Verification of Cryptographic Signature SNYK-JS-NODEFORGE-2430337	494
	Improper Verification of Cryptographic Signature SNYK-JS-NODEFORGE-2430341	494
	Regular Expression Denial of Service (ReDoS) SNYK-JS-LOADERUTILS-3042992	479
	Regular Expression Denial of Service (ReDoS) SNYK-JS-LOADERUTILS-3105943	479
	Inefficient Regular Expression Complexity SNYK-JS-MICROMATCH-6838728	479
	Regular Expression Denial of Service (ReDoS) SNYK-JS-MINIMATCH-3050818	479
	Improper Input Validation SNYK-JS-POSTCSS-5926692	479
	Regular Expression Denial of Service (ReDoS) SNYK-JS-TERSER-2806366	479
	Regular Expression Denial of Service (ReDoS) SNYK-JS-BRACEEXPANSION-9789073	436

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• Max score is 1000. Note that the real score may have changed since the PR was raised.
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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Regular Expression Denial of Service (ReDoS)
🦉 Arbitrary Code Injection
🦉 Improper Control of Dynamically-Managed Code Resources
🦉 More lessons are available in Snyk Learn