fix(errors): improve message when version validation fails (#161)

Closes #160

Author: mcous

Diff for: dist/main.js

@@ -217,6 +217,7 @@ describe("readManifest", () => {
     const result = subject.readManifest(directory);
 
     await expect(result).rejects.toThrow(errors.InvalidPackageVersionError);
+    await expect(result).rejects.toThrow(/42/iu);
   });
 
   it("should error if publishConfig is invalid", async () => {

Diff for: dist/main.js.map

@@ -69,7 +69,9 @@ export class InvalidPackageNameError extends TypeError {
 
 export class InvalidPackageVersionError extends TypeError {
   public constructor(value: unknown) {
-    super(`Package version must be a string, got "${String(value)}"`);
+    super(
+      `Package version must be a valid semantic version, got "${String(value)}"`
+    );
     this.name = "InvalidPackageVersionError";
   }
 }

Diff for: src/__tests__/read-manifest.test.ts

@@ -121,7 +121,7 @@ export async function readManifest(
   }
 
   if (typeof version !== "string") {
-    throw new errors.InvalidPackageVersionError(version);
+    throw new errors.InvalidPackageVersionError(manifestJson["version"]);
   }
 
   if (