Upgrade sprockets version to 2.2.0

[guilleiguaran]

This version fixes encoding issues under Ruby 1.9.

I prefer do a conservative upgrade to 2.2.0 in 3-2-stable branch. In master I upgraded it to 2.4.0

[lucasmazza]

❤️

Also, Sprockets 2.3.1/2.3.2 has some other bugfixes that could be shipped, but bumping to 2.2 is nice enough :)

[jeremy]

Safe to bump a dependency like Sprockets on 3-2-stable?

[guilleiguaran]

@jeremy isn't totally safe but some users (like @rafaelfranca) are having those encoding issues.

I would suggest bump it only if we don't have planned any release near and we have enough time to test it to catch any regression.

[rafaelfranca]

Maybe, relaxing the dependency with something like this will work fine to @lucasmazza case:

s.add_dependency('sprockets',     '>= 2.1.2', '< 2.3.0')

[jeremy]

What's unsafe about it?

[rafaelfranca]

Unsure. Looking at the CHANGELOG and the diff I didn't see nothing that can break.

[kugaevsky]

Yeah. This dependency upgrade would be very useful.

[clowder]

+1

[arunagw]

Hey @guilleiguaran can we close this in favor of #6299 ?

[rafaelfranca]

I don't think so.

[alanhogan]

There’s a really annoying bug with glob caching in Sprockets 2.1.3, the version Rails currently requires.

Sprockets is now at 2.4.3.

Can’t we upgrade sprockets?

sstephenson/sprockets#336

[paulcoyle]

Having the same problems as @alanhogan so consider this a +1