Use utf8mb4 instead of utf8

Author: kubo39

integration-tests/source/mysql/test/integration.d

@@ -967,17 +967,15 @@ unittest
 	mixin(scopedCn);
 	auto stmt = cn.prepare(
 			"SELECT * FROM information_schema.character_sets"~
-			" WHERE CHARACTER_SET_NAME=? OR CHARACTER_SET_NAME=?");
-	auto val1 = "utf8";
-	auto val2 = "utf8mb3";
-	stmt.setArg(0, val1);
-	stmt.setArg(1, val2);
+			" WHERE CHARACTER_SET_NAME=?");
+	auto val = "utf8mb4";
+	stmt.setArg(0, val);
 	auto row = cn.queryRow(stmt).get;
 	assert(row.length == 4);
-	assert(row[0] == "utf8" || row[0] == "utf8mb3");
-	assert(row[1] == "utf8_general_ci" || row[1] == "utf8mb3_general_ci");
+	assert(row[0] == "utf8mb4");
+	assert(row[1] == "utf8mb4_general_ci");
 	assert(row[2] == "UTF-8 Unicode");
-	assert(row[3] == 3);
+	assert(row[3] == 4);
 }
 
 @("coupleTypes")