gopls/internal/regtest/misc: unskip TestMajorOptionsChange

This test was fixed in CL 494675, which forced snapshots to observe all
overlays when updating the view.

Updates golang/go#53878
Fixes golang/go#57934

Change-Id: I018bdd260255d6a630c7fc8788935fd69f5e7477
Reviewed-on: https://go-review.googlesource.com/c/tools/+/496883
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Alan Donovan <[email protected]>
gopls-CI: kokoro <[email protected]>
Run-TryBot: Robert Findley <[email protected]>

Author: findleyr

gopls/internal/regtest/misc/configuration_test.go

@@ -57,9 +57,7 @@ var FooErr = errors.New("foo")
 //
 // Gopls should not get confused about buffer content when recreating the view.
 func TestMajorOptionsChange(t *testing.T) {
-	t.Skip("broken due to golang/go#57934")
-
-	testenv.NeedsGo1Point(t, 17)
+	testenv.NeedsGo1Point(t, 19) // needs staticcheck
 
 	const files = `
 -- go.mod --