Change log

v7.x

Reorganize modules
Add new toolkits
- http(no https support)
- compress/uncompress: zlib
- encode/decode: message pack, json, etc.

v6.x

Remove the trie related functions
Rename the SerDe feature to ser_de

v5.x

Add more crypto/codec utils
Remove features related to no_std and wasm32

v4.x

Add new moduler: hash
Add new feature: no_std

v3.x

Add support for remote command execution based on the SSH protocol
Remove syntactic sugar for printing information in the 'Debug' format
- eg, d!(@a_struct) should be replaced with d!("{:?}", a_struct) in v3.0.x
Optimize documentations