tests: fix travis LTS

lib/manager/travis/__snapshots__/package.spec.ts.snap

@@ -4,8 +4,8 @@ exports[`lib/manager/travis/package getPackageUpdates detects pinning 1`] = `
 Array [
   Object {
     "isRange": true,
-    "newMajor": 12,
-    "newValue": "10.0.1,12.3.0",
+    "newMajor": 14,
+    "newValue": "10.0.1,12.3.0,null",
     "sourceUrl": "https://github.com/nodejs/node",
   },
 ]
@@ -15,8 +15,8 @@ exports[`lib/manager/travis/package getPackageUpdates returns result if needing
 Array [
   Object {
     "isRange": true,
-    "newMajor": 12,
-    "newValue": "10,12",
+    "newMajor": 14,
+    "newValue": "10,12,14",
     "sourceUrl": "https://github.com/nodejs/node",
   },
 ]

lib/manager/travis/package.spec.ts

@@ -26,7 +26,7 @@ describe('lib/manager/travis/package', () => {
       expect(await getPackageUpdates(config)).toEqual([]);
     });
     it('returns empty if matching', async () => {
-      config.currentValue = ['12'];
+      config.currentValue = ['12', '14'];
       config.supportPolicy = ['lts_active'];
       expect(await getPackageUpdates(config)).toEqual([]);
     });