Log Message:
py-dogpile-cache: updated to 0.6.7

0.6.7:
[bug] Fixed issue in the CacheRegion.get_or_create_multi() method which was \ 
erroneously considering the cached value as the timestamp field if the \ 
CacheRegion.invalidate() method had ben used, usually causing a TypeError to \ 
occur, or in less frequent cases an invalid result for whether or not the cached \ 
value was invalid, leading to excessive caching or regeneration. The issue was a \ 
regression caused by an implementation issue in the pluggable invalidation \ 
feature added in 38.

0.6.6:
[feature] Added method CacheRegion.actual_backend which calculates and caches \ 
the actual backend for the region, which may be abstracted by the use of one or \ 
more ProxyBackend subclasses.
[bug] Fixed a condition in the Lock where the “get” function could be called \ 
a second time unnecessarily, when returning an existing, expired value from the \ 
cache.

0.6.5:
[bug] Fixed import issue for Python 3.7 where several variables named \ 
“async” were, leading to syntax errors. Pull request courtesy Brian Sheldon.