Update to rocket v0.5.1

[beyera]

Updated all dependencies and docs to rocket v0.5.1

[beyera]

Pinging @ralpha on this one.

[michelbieleveld]

Pinging @ralpha as well ;-) would love to see to get the merged.

[necmettindev]

@ralpha @GREsau pinging :)

[SohumB]

This PR probably needs updates to

rocket_db_pools 0.2.0
rocket_dyn_templates 0.2.0
rocket_ws 0.1.1

as indicated on rocket's changelog, right?

[jacks0n9]

please bro i can't even use okapi because it's set to =0.5.0 for some reason. (i mean it is open source but still)

[ri-nat]

@ralpha @GREsau can some of you just merge this?

[ralpha]

Sorry for the late response. Merged https://github.com/GREsau/okapi/pull/149 in favor of this one. But made sure I have had all the changes from here too.

Please test if everything is working as intended with the current master branch and then I'll do a crates.io release soon (next days, after looking at other MR's and Issues.)

[ralpha]

Released rocket-okapi version 0.9.0. So I hope you can all happily upgrade now. Have fun! And let me know if you find any issues.

[jacks0n9]

yayyy