fix(ignore): Fix 2 to 3 migration enabling frontend/availabilty/homeassistant when not set

[Koenkk]

Fix issue with the 2 to 3 migration enabling features when not set, e.g. before this PR:

homeassistant: false

would result in

homeassistant:
  enabled: false
frontend:
  enabled: true
availability:
  enabled: true

This PR fixes that

[Nerivec]

The problem appears to be in getValue rather (validPath should be false):

zigbee2mqtt/lib/util/settingsMigration.ts

Lines 90 to 92 in 329b8c9

	if (i === path.length - 1) {
	return [true, currentSettings[key]];
	} else {

        if (i === path.length - 1) {
            const setting = currentSettings[key];

            return [setting != undefined, setting];
        } else {

That should also fix the improper log in your test.

            expect(migrationNotesContent).toContain(`[SPECIAL] Property 'homeassistant' is now always an object.`);
-            expect(migrationNotesContent).toContain(`[SPECIAL] Property 'frontend' is now always an object.`);
-            expect(migrationNotesContent).toContain(`[SPECIAL] Property 'availability' is now always an object.`);

[Koenkk]

@Nerivec I think I fixed it correctly now.