Update thiserror requirement from 1.0 to 2.0 (#270)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Taiki Endo <taiki@smilerobotics.com>

.deny.toml

@@ -29,6 +29,7 @@ allow = [
     "Apache-2.0",
     "MIT",
     "Unicode-DFS-2016", # unicode-ident
+    "Unicode-3.0",
     "BSD-3-Clause",
     "CC0-1.0",
     "ISC",

Cargo.toml

@@ -26,7 +26,7 @@ mesh-loader = "0.1.6"
 rand = "0.8"
 serde = { version = "1.0", features = ["derive"] }
 structopt = "0.3"
-thiserror = "1.0"
+thiserror = "2.0"
 tracing = "0.1"
 urdf-rs = "0.9"