Fix some license comments

Author: elbakramer

src/pynescript/ast/grammar/antlr4/resource/PinescriptLexer.g4

@@ -9,7 +9,7 @@
 // an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 // 
-// SPDX-License-Identifier: LGPL-3.0
+// SPDX-License-Identifier: LGPL-3.0-or-later
 
 lexer grammar PinescriptLexer;
 

src/pynescript/ast/grammar/antlr4/resource/PinescriptParser.g4

@@ -9,7 +9,7 @@
 // an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 // specific language governing permissions and limitations under the License.
 // 
-// SPDX-License-Identifier: LGPL-3.0
+// SPDX-License-Identifier: LGPL-3.0-or-later
 
 parser grammar PinescriptParser;
 

src/pynescript/ast/grammar/asdl/resource/Pinescript.asdl

@@ -12,7 +12,7 @@
 -- See the License for the specific language governing permissions and
 -- limitations under the License.
 --
--- SPDX-License-Identifier: LGPL-3.0
+-- SPDX-License-Identifier: LGPL-3.0-or-later
 
 module Pinescript
 {

src/pynescript/ast/grammar/asdl/tool/__init__.py

@@ -0,0 +1,15 @@
+# Copyright 2024 Yunseong Hwang
+#
+# Licensed under the GNU Lesser General Public License Version 3.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.gnu.org/licenses/lgpl-3.0.en.html
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: LGPL-3.0-or-later