Bump rollup peer dependency to support v2

[vladshcherbin]

👋 Hey, I've tried to install current latest version for rollup (25.8.0) and it gave me a warning:

warning " > @modular-css/rollup@25.8.0" has incorrect peer dependency "rollup@^1.1.2".

I found recent #733 about rollup 2. Would be awesome to see this warning go away 🙌

Expected Behavior

No warnings on installation.

Current Behavior

Warning during installation.

Possible Solution

Bump rollup peer dependency.

Steps to Reproduce (for bugs)

1. Create new project
2. Add rollup >= 2
3. Install latest plugin version

Context

Tried to switch from css modules and saw a welcome warning 😢

Your Environment

Executable	Version
modular-css	25.8.0
yarn --version	1.22.4
node --version	14.0.0

OS	Version
macOS Mojave	10.14.6

[tivac]

Whoops 🤦🏻‍♂️. Thanks for the report! A PR would be great, if not I'll try to get to this soon.

[tivac]

Fixed in @modular-css/rollup@25.8.1 (also fixed/published @modular-css/rollup-rewriter@25.8.1 while I was at it)

[vladshcherbin]

@tivac thanks 🎉