support clap_ long_version function and doc cargo feature flags

fixed

• #76
• #77
• #78
• #79

change api

• clap_version deprecated
• Replaceclap_version with clap_long_version

Thanks @epage

fix RUST_CHANNEL get value error

fix #67

use is_debug crate; upgrade version 0.8.0

upgrade shadow-rs#0.8.0

upgrade rust edition 2021

0.7.2

upgrade shadow-rs#0.7.2

0.7.1

make function hook pub

support cargo rerun which inject external env

0.7.0

fix cargo fix

0.6.13

• fix doc generate
• fix env changed rerun

0.6.12

fix #44

support BUILD_TARGET,BUILD_TARGET_ARCH const

0.6.11

update doc

version 0.6.9 without git feature fails to compile

fix #66