upgrade shadow-rs 0.5.8 (#2861)

* update to shadow-rs 0.4. use easy

* update shadow-rs to 0.5

* fix version not used

* update

* update Cargo.lock

* update Cargo.lock

* fix wasm build error when use dependence git2
fix error link:https://dev.azure.com/nushell/nushell/_build/results?buildId=4858&view=logs&j=1a745d4c-b027-5f34-06d8-d6f256bfe9f9&t=a0a335cb-fa1f-5bbf-be01-1a90d6899e54

* remove code not used; fix warning by RUSTFLAGS="-D warnings" build error

* upgrade shadow-rs 0.5.2

* upgrade shadow-rs 0.5.7

make nushell reduce dependence crates smaller and  build fast.

* upgrade shadow-rs 0.5.8

fix when use api 'strip_prefix()' method in less than rust1.45.0 build failed

Cargo.lock

@@ -5259,9 +5259,9 @@ dependencies = [
 
 [[package]]
 name = "shadow-rs"
-version = "0.5.7"
+version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73d9796f3ab288d5f5a06430723004eeb134c6a0bb3674ba4a124c557f137127"
+checksum = "48d36234bd8117223aa622e2ab8aa530f4db4e48f651c2afd445cc3178b4ecdb"
 dependencies = [
  "chrono",
  "git2",