Thanks @ProgVal for the tip

Remove dependency csrf 0.3 as unmatained and can't compile on arm8
Add ring to do required cryptography
Remove dependency to rand as ring provid CPRNG

Updates the requirements on [rand](https://github.com/rust-random/rand) to permit the latest version.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-random/rand/commits/0.6.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Don't insert token when method is unspecified or different from POST
Run cargo clippy

bump rocket version

Add a macro must_finish, and use it in csrf_proxy's tests, to allow
	detection of infinite loop in parser

Create new cookies only when loading html content

Don't store a cookie for each different path visited
Don't add csrf cookies if there is no session
Remove csrf cookie if session get dropped

Update to a more recent version of rocket and to nightly-2018-07-17

Add dependancies required for tests
Fix encoding issue with some url encoders

Add test for truncated html
Fix issue where parser would loop on some invalid html

Add some tests
Fix issue when a buffer end at the wrong place, and prevent token from
being inserted
Correct comments and indentation

Add test for CsrfProxy
Fix errors new tests highlighted

Full rewrite of csrf_proxy to make it more reliable

Fix a bug where CsrfProxy would read data that was already present in
read buffer, where it should consider it uninitialized
Reported by @gled-rs on Plume-org/Plume#96

Remove all clippy warnings to make code more idiomatic

Fix issue where CsrfToken was setting cookieswas setting cookies properly, but pseudo-proxying would not

add a fairing for automatic verification and tag insertion