detect gitlab renovate config files

also organize the list in order of appearance on website.
this makes it easier to compare.

Signed-off-by: Spencer Schrock <sschrock@google.com>

checks/raw/dependency_update_tool.go

@@ -92,9 +92,16 @@ var checkDependencyFileExists fileparser.DoWhileTrueOnFilename = func(name strin
 			},
 		})
 
-		// https://docs.renovatebot.com/configuration-options/
-	case ".github/renovate.json", ".github/renovate.json5", ".renovaterc.json", "renovate.json",
-		"renovate.json5", ".renovaterc":
+	// https://docs.renovatebot.com/configuration-options/
+	case "renovate.json",
+		"renovate.json5",
+		".github/renovate.json",
+		".github/renovate.json5",
+		".gitlab/renovate.json",
+		".gitlab/renovate.json5",
+		".renovaterc",
+		".renovaterc.json",
+		".renovaterc.json5":
 		*ptools = append(*ptools, checker.Tool{
 			Name: "RenovateBot",
 			URL:  asPointer("https://github.com/renovatebot/renovate"),

checks/raw/dependency_update_tool_test.go

@@ -63,6 +63,18 @@ func Test_checkDependencyFileExists(t *testing.T) {
 			want:    true,
 			wantErr: false,
 		},
+		{
+			name:    ".gitlab/renovate.json",
+			path:    ".gitlab/renovate.json",
+			want:    true,
+			wantErr: false,
+		},
+		{
+			name:    ".gitlab/renovate.json5",
+			path:    ".gitlab/renovate.json5",
+			want:    true,
+			wantErr: false,
+		},
 		{
 			name:    ".renovaterc.json",
 			path:    ".renovaterc.json",