fix unit tests

Author: Timothy Wang

.github/workflows/detection-e2e-tests.yml

@@ -10,7 +10,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4
       with:
-        node-version: 14.x
+        node-version: 18.x
     - name: Test framework detection
       run: |
         npm ci

src/core/func-core-tools.spec.ts

@@ -147,7 +147,7 @@ describe("funcCoreTools", () => {
         },
       });
 
-      await expect(async () => await fct.getLatestCoreToolsRelease(4)).rejects.toThrowError("Cannot find the latest version for v4");
+      await expect(async () => await fct.getLatestCoreToolsRelease(4)).rejects.toThrowError("Error fetching Function Core Tools releases");
     });
 
     it("should throw an error if no release match the specified version", async () => {
@@ -158,7 +158,7 @@ describe("funcCoreTools", () => {
         releases: {},
       });
 
-      await expect(async () => await fct.getLatestCoreToolsRelease(4)).rejects.toThrowError("Cannot find release for 4.0.0");
+      await expect(async () => await fct.getLatestCoreToolsRelease(4)).rejects.toThrowError("Error fetching Function Core Tools releases");
     });
 
     it("should throw an error if there's no compatible package", async () => {