feat: add support for editions

In addition to adding support for edition keyword,
this also adds support for the new grammer rules introduced such as
skipping `"` (quotation) marks around reserved field names.

README.md

@@ -2,12 +2,23 @@
 
 [![CI][ci]](https://github.com/coder3101/tree-sitter-proto/actions/workflows/ci.yml)
 [![crates][crates]](https://crates.io/coder3101/tree-sitter-proto)
-[![npm][npm]](https://www.npmjs.com/package/tree-sitter-proto)
-[![pypi][pypi]](https://pypi.org/project/tree-sitter-proto)
 
 Protocol buffer grammer for [tree-sitter](https://github.com/tree-sitter/tree-sitter).
 
+
+## ✨ Features
+
+- ✅ Basic Proto2 support
+- ✅ Proto3 support
+- ✅ Support for editions
+
+
+### Special Thanks 
+
+Special thanks to the following people for their amazing work in this grammer.
+
+- [mitchellh](https://github.com/mitchellh/tree-sitter-proto) for their original work.
+- [treywood](https://github.com/treywood/tree-sitter-proto) for basic proto2 support.
+
 [ci]: https://img.shields.io/github/actions/workflow/status/coder3101/tree-sitter-proto/ci.yml?logo=github&label=CI
-[npm]: https://img.shields.io/npm/v/tree-sitter-proto?logo=npm
-[crates]: https://img.shields.io/crates/v/tree-sitter-proto?logo=rust
-[pypi]: https://img.shields.io/pypi/v/tree-sitter-proto?logo=pypi&logoColor=ffd242
+[crates]: https://img.shields.io/crates/v/tree-sitter-proto?logo=rust

grammar.js

@@ -413,17 +413,27 @@ module.exports = grammar({
       ))),
     )),
 
-    // reserved_identifier = \" letter { letter | decimalDigit | "_" } \"
-    reserved_identifier: $ => token(seq(
-      '"',
-      letter,
-      optional(repeat(choice(
-        letter,
-        decimal_digit,
-        '_',
-      ))),
-      '"',
-    )),
+    // reserved_identifier = \" | ' letter { letter | decimalDigit | "_" } ' | \"
+    reserved_identifier: $ => token(
+      choice(
+        seq(
+          '"',
+          letter,
+          optional(repeat(choice(letter, decimal_digit, '_'))),
+          '"'
+        ),
+        seq(
+          "'",
+          letter,
+          optional(repeat(choice(letter, decimal_digit, '_'))),
+          "'"
+        ),
+        seq(
+          letter,
+          optional(repeat(choice(letter, decimal_digit, '_')))
+        )
+      )
+    ),
     _identifier_or_string: $ => choice($.identifier, $.string),
 
     // fullIdent = ident { "." ident }