Fix tests

.github/workflows/snap.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.18
+          go-version: 1.21
 
       - uses: snapcore/action-build@v1
         id: build

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.18
+        go-version: 1.21
 
     - name: Test
       run: go test ./...

main_test.go

@@ -106,8 +106,8 @@ func TestCollapseRecursive(t *testing.T) {
 }
 
 func TestCollapseRecursiveWithSizes(t *testing.T) {
-	theme.showSizes = true
-	defer func() { theme.showSizes = true }()
+	theme.ShowSizes = true
+	defer func() { theme.ShowSizes = true }()
 
 	tm := prepare(t)