Release new version

[Felixoid]

Hello. Here I'm trying to provide the changelog. If it fits requirements, I'll appreciate so much the new release

Changes since v.0.11.7

## Features

- Add memory-return-interval option
- Decrease amount of transferred data with an aggregation of values and timestamps by Path
    - Increase `scanner.Buffer` to fix `bufio.Scanner: token too long`
- Add `noprom` tag to make prometheus dependency optional
- Upload packages to https://packagecloud.io/go-graphite/

## Bugfix

- Fix metric finder content type for `protobuf`
- Remove unused escape functions 
- Sort labels with __name__
- Allow using `graphite..inner.data` as rollup table
- Fix broken deb-compression fpm argument

[Felixoid]

done, 0.12.0 is released