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backend/node_modules/validator/es/lib/isSemVer.js

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+import assertString from './util/assertString';
+import multilineRegexp from './util/multilineRegex';
+
+/**
+ * Regular Expression to match
+ * semantic versioning (SemVer)
+ * built from multi-line, multi-parts regexp
+ * Reference: https://semver.org/
+ */
+var semanticVersioningRegex = multilineRegexp(['^(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)', '(?:-((?:0|[1-9]\\d*|\\d*[a-z-][0-9a-z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-z-][0-9a-z-]*))*))', '?(?:\\+([0-9a-z-]+(?:\\.[0-9a-z-]+)*))?$'], 'i');
+export default function isSemVer(str) {
+  assertString(str);
+  return semanticVersioningRegex.test(str);
+}