Update monolog-bundle dependency to 2.2.*

Dependency on the old monolog bundle is causing a <1.3 version of
monolog to be installed, which is causing breakage because that
version does not implement the PSR-3 interface yet. 
merged branch igorw/patch-1 (PR #471)

This PR was merged into the master branch.

Commits
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65c5b2a Update monolog-bundle dependency to 2.2.*

Discussion
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Update monolog-bundle dependency to 2.2.*

Dependency on the old monolog bundle is causing a <1.3 version of
monolog to be installed, which is causing breakage because that
version does not implement the PSR-3 interface yet.