Pymemcache instrumenter version selector is for very old package version

[ij1]

Is your feature request related to a problem?
Any recent pymemcache package triggers an error due to version selector in its instrumenter:
DependencyConflict: requested: "pymemcache ~= 1.3" but found: "pymemcache 3.5.0"

Describe the solution you'd like
Up the pymemcache instrumenter's version selector.

Describe alternatives you've considered
Either no telemetry from pymemcache or major downgrade for pymemcache package. Neither seems optimal.

[srikanthccv]

Are there any major breaking changes in version 2.x and 3.x? If not, it should be easier to bump the supported versions.

[ij1]

While I've only recently migrated to pymemcache myself, going through the changelogs seemed like no changes to major API functions (there are tweaks to function parameter but I guess they're not meaningful from telemetry PoV).