fix: downgrade karma-spec-reporter to fix JS test logging (#35954)

The karma-spec-reporter npm package is a Karma plugin which tells Karma to
print the name of each spec (e.g. test case). This is extremely useful
as a maintainer to be able to visually inspect the CI logs and confirm
that we are actually running JS tests and not just giving
false-positives.

We are stuck on an ancient Karma version (0.13.22, lastest is 6.x),
which seems to be incompatible with the latest karma-spec-reporter version
(0.0.36). Since upgrading karma-spec-reporter, spec name printing has
failed with:

    02 12 2024 20:59:28.164:WARN [plugin]: Error during loading "karma-spec-reporter" plugin:
      Cannot read properties of undefined (reading 'LOG_PRIORITIES')

Downgrading to [email protected] eliminates this error and
restoring spec name printing to our JS CI logs.

.github/renovate.json5

@@ -32,7 +32,11 @@
   // When adding an ignoreDep, please include a reason and a public link that we can use to follow up and ensure
   // that the ignoreDep is removed.
   // This can be done as a comment within the ignoreDeps list.
-  "ignoreDeps": [],
+  "ignoreDeps": [
+    // karma-spec-reporter>0.20.0 does not seem compatible with our super-old 2016 Karma version (0.13.22).
+    // Ticket link: None, as upgrading Karma does not strike as worth the benefit.
+    "karma-spec-reporter"
+  ],
   "timezone": "America/New_York",
   "prConcurrentLimit": 3,
   "enabledManagers": ["npm"]

package.json

@@ -103,7 +103,7 @@
     "karma-requirejs": "1.1.0",
     "karma-selenium-webdriver-launcher": "github:openedx/karma-selenium-webdriver-launcher#0.0.4-openedx.0",
     "karma-sourcemap-loader": "0.4.0",
-    "karma-spec-reporter": "0.0.36",
+    "karma-spec-reporter": "0.0.20",
     "karma-webpack": "^5.0.1",
     "plato": "1.7.0",
     "react-test-renderer": "16.14.0",