Update transient.rs

Replaced `std::string::ParseError` impl with `std::convert::Infallible`, since the former is just a type alias for the latter.

src/transient.rs

@@ -428,20 +428,19 @@ mod std_impls {
         f32, f64, String, Box<str>, (),
         std::char::ParseCharError,
         std::char::DecodeUtf16Error,
+        std::convert::Infallible,
         std::num::ParseIntError,
         std::num::ParseFloatError,
         std::num::IntErrorKind,
         std::num::TryFromIntError,
         std::str::ParseBoolError,
         std::str::Utf8Error,
-        std::string::ParseError,
         std::string::FromUtf8Error,
         std::string::FromUtf16Error,
         std::net::AddrParseError,
         std::io::Error,
         std::io::ErrorKind,
         std::fmt::Error,
-
         std::env::VarError,
         std::env::JoinPathsError,
         std::time::SystemTimeError,