Upgrade to Micrometer 1.0.6

[jkschneider]

Target release date of July 12.

[wilkinsona]

@jkschneider Have you opened this as you'd like us to build against snapshots in the run up to the release? If not, there's no need for an issue as we'll pick up the new version semi-automatically once it hits Central.

[bclozel]

As pointed out by @uvpoblotzki on gitter, this release contains a fix for a tag cardinality issue in MeterFilter, which can cause memory issues at runtime (see commit on micrometer).

[jkschneider]

@bclozel Thanks for noting that. Got a couple more nasty issues to work through and will hopefully release tomorrow!

[snicoll]

Closing in favour of PR #13819