Update .gitignore

Fix raw request output

x8 3.0.0 -> 3.0.1

Update --help

x8 2.5.0 -> 3.0.0-beta.1

x8 2.4.0 -> 2.5.0

x8 2.3.4 -> 2.4.0

Fix parameter discovering in json body

x8 2.3.2 -> 2.3.3

Fix raw requests with http/2