test: lowercase base36

Base36 was introduced mainly for use in DNS, and various user agents
force lowercase, so tests should use that instead.

License: MIT
Signed-off-by: Marcin Rataj <lidel@lidel.org>

cid_test.go

@@ -556,7 +556,7 @@ func BenchmarkStringV1(b *testing.B) {
 func TestReadCidsFromBuffer(t *testing.T) {
 	cidstr := []string{
 		"bafkreie5qrjvaw64n4tjm6hbnm7fnqvcssfed4whsjqxzslbd3jwhsk3mm",
-		"K2CWUECKQKIBUTVHKR4P2LN2PJCAXAAKPD9DB0E7J7AX1LXHHXY3EKPV",
+		"k2cwueckqkibutvhkr4p2ln2pjcaxaakpd9db0e7j7ax1lxhhxy3ekpv",
 		"Qmf5Qzp6nGBku7CEn2UQx4mgN8TW69YUok36DrGa6NN893",
 		"zb2rhZi1JR4eNc2jBGaRYJKYM8JEB4ovenym8L1CmFsRAytkz",
 	}