Update dependencies

Don't update everything to latest; focus primarily on incompatible (technically
SemVer-breaking) updates. In some cases of compatible updates, older versions
work fine, and allowing a wider range (lower bound) of versions increases
cross-compatibility in the ecosystem.

Note about bindgen: their API change from CargoCallbacks to CargoCallbacks::new()
introduced a semantic change that recompiled headers repeatedly. Neither deprecation
notice nor API docs mention this, but old behavior can be restored via flag.
Added some comments about why this behavior is customized (infinite rebuild loop).

Author: Bromeon

Cargo.toml

@@ -22,31 +22,32 @@ members = [
 gdextension-api = { version = "0.2.2", git = "https://github.com/godot-rust/godot4-prebuilt", branch = "releases" }
 
 # Main library features.
-glam = { version = "0.28", features = ["debug-glam-assert"] }
+glam = { version = "0.30", features = ["debug-glam-assert"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 
 # Related to tooling/build setup.
 # * regex: not used for unicode parsing -> features unicode-bool + unicode-gencat are enabled instead of unicode-perl.
 #          'unicode-gencat' needed for \d, see https://docs.rs/regex/latest/regex/#unicode-features.
-# * bindgen: version 0.69 had regression that forced recompilation of code. We used 0.68 for quite a while, need to see if problem persists.
 bindgen = { version = "0.71", default-features = false, features = ["runtime"] }
 libc = "0.2.172"
 regex = { version = "1.11", default-features = false, features = ["std", "unicode-bool", "unicode-gencat"] }
 which = "7"
 
 # Macros and codegen. Minimal versions compatible with -Zminimal-versions.
 # * proc_macro2: Literal::c_string() added in 1.0.80.
+# * quote: 1.0.37 allows tokenizing CStr.
+# * venial: 0.6.1 contains some bugfixes.
 heck = "0.5"
-litrs = "0.4.1"
-markdown = "=1.0.0-alpha.21"
-nanoserde = "0.1.35"
+litrs = "0.4"
+markdown = "=1.0.0-alpha.23"
+nanoserde = "0.2"
 proc-macro2 = "1.0.80"
-quote = "1.0.29"
+quote = "1.0.37"
 venial = "0.6.1"
 
 # Testing (godot-cell, itest).
-proptest = "1.4.0"
+proptest = "1.6.0"
 pin-project-lite = { version = "0.2" }
 
 # Note about Jetbrains IDEs: "IDE Sync" (Refresh Cargo projects) may cause static analysis errors such as

godot-bindings/src/header_gen.rs

@@ -11,15 +11,21 @@ use std::path::Path;
 pub(crate) fn generate_rust_binding(in_h_path: &Path, out_rs_path: &Path) {
     let c_header_path = in_h_path.display().to_string();
 
-    // Listening to changes on files that are generated by this build step cause an infinite loop with cargo watch of
-    // build -> detect change -> rebuild -> detect change -> ...
+    // Default behavior of bindgen is to invalidate the built crate whenever any of the included header files changed. This is sensible,
+    // but in our case, listening to changes on files that are generated by this build step cause an infinite loop with cargo watch of:
+    //     build -> detect change -> rebuild -> detect change -> ...
     // println!("cargo:rerun-if-changed={}", c_header_path);
+    //
+    // Without `rerun_on_header_files(false)`, the following command causes repeated recompilation of godot-ffi onward:
+    //     cargo build -p itest --features godot/api-custom
+    //
+    // This is non-trivial to fix and isn't planned at the moment, see https://github.com/godot-rust/gdext/issues/281.
+    // If you have an idea to address this without too invasive changes, please comment on that issue.
+    let cargo_cfg = bindgen::CargoCallbacks::new().rerun_on_header_files(false);
 
     let builder = bindgen::Builder::default()
         .header(c_header_path)
-        // Tell cargo to invalidate the built crate whenever any of the
-        // included header files changed.
-        .parse_callbacks(Box::new(bindgen::CargoCallbacks))
+        .parse_callbacks(Box::new(cargo_cfg))
         .prepend_enum_name(false);
 
     std::fs::create_dir_all(