fix(tooling): migrate project config and test tooling while hardening fuzzy version parsing

ts/index.ts

@@ -2,10 +2,14 @@ import * as plugins from './smartversion.plugins.js';
 
 export class SmartVersion {
   public static fromFuzzyString(fuzzyString: string): SmartVersion {
-    return new SmartVersion(plugins.semver.minVersion(fuzzyString).version, fuzzyString);
+    const minVersion = plugins.semver.minVersion(fuzzyString);
+    if (!minVersion) {
+      throw new Error(`Cannot determine a minimum version from fuzzy string "${fuzzyString}".`);
+    }
+    return new SmartVersion(minVersion.version, fuzzyString);
   }
 
-  public originalVersionString: string;
+  public originalVersionString: string | undefined;
   public semver: plugins.semver.SemVer;
   public get versionString(): string {
     return this.semver.version;
@@ -53,13 +57,14 @@ export class SmartVersion {
   /**
    * tries to get the best match from a range of available versions
    */
-  public getBestMatch(availableVersions: string[]): string {
-    let bestMatchingVersion: string;
+  public getBestMatch(availableVersions: string[]): string | undefined {
+    const range = this.originalVersionString ?? this.versionString;
+    let bestMatchingVersion: string | undefined;
     for (const versionArg of availableVersions) {
-      if (!plugins.semver.satisfies(versionArg, this.originalVersionString)) {
+      if (!plugins.semver.satisfies(versionArg, range)) {
         continue;
       }
-      if(!bestMatchingVersion) {
+      if (!bestMatchingVersion) {
         bestMatchingVersion = versionArg;
       } else {
         if (plugins.semver.lt(bestMatchingVersion, versionArg)) {