Switch to tree-sitter-dart-orchard #557

thread '<unnamed>' panicked at src/ast.rs:320:30:
byte index 32 is not a char boundary; it is inside '个' (bytes 31..34) of `=
    '\r\r\r\r\r\r本APP属于个人的非赢利性开源项目，以供开源社区使用，凡本APP转载的所有的文章 、图片、音频、视频文件等资料的版权归版权所有人所有，本APP采用的非本站原创文章及图片等`[...]

I was a bit worried that the semicolon issue was the tip of the iceberg, so I ran a benchmark before and after this PR: | Language | Cases | Exact | Format | Conflict | Differ | Parse | Panic | Time (s) | | -------- | ----- | ----- | ------ | -------- | ------ | ----- | ----- | -------- | | `*.dart` | 185 | -2 **(-1.1%)** | -1 **(-0.5%)** | +13 **(+7.0%)** | -11 **(-5.9%)** | +0 | +1 **(+0.5%)** | +0.003 (+11.7%) | | ↓ Before \ After → | Exact | Format | Conflict | Differ | Parse | Panic | | ------------------ | ----- | ------ | -------- | ------ | ----- | ----- | | Exact | 25 | | **3** | | | | | Format | **1** | 20 | | | | | | Conflict | | | 49 | | | **1** | | Differ | | | **11** | 72 | | | | Parse | | | | | 3 | | | Panic | | | | | | | Yay, another panic! ``` thread '<unnamed>' panicked at src/ast.rs:320:30: byte index 32 is not a char boundary; it is inside '个' (bytes 31..34) of `= '\r\r\r\r\r\r本APP属于个人的非赢利性开源项目，以供开源社区使用，凡本APP转载的所有的文章 、图片、音频、视频文件等资料的版权归版权所有人所有，本APP采用的非本站原创文章及图片等`[...] ``` Also the new conflicts seem like they're worth inspecting as they are likely a symptom for a new problem in the grammar.

ah, the panic is because we take the first 32 _bytes_ of a `&str`, but that happens not to lie on a character boundary in this case

Lgtm as well All forks of the original tree-sitter-dart (including the one I proposed) seem rather dead so I think it's reasonable to host and use a new fork