Added unicode tests

re_test.go

@@ -109,6 +109,10 @@ var reTests = []struct {
 	{`\d{3,4}`, "ababab555", []MatchIndex{{6, 9}}},
 	{`\bpaint\b`, "paints", []MatchIndex{}},
 	{`\b\w{5}\b`, "paint", []MatchIndex{{0, 5}}},
+
+	// Unicode tests
+	{`.+`, "úïäö´«åæïëòöê»éãçâï«úïòíñ", []MatchIndex{{0, 25}}},
+	{`a.b`, "a²b", []MatchIndex{{0, 3}}},
 }
 
 func TestFindAllMatches(t *testing.T) {