Add caching to the SSM middleware

[vladholubiev]

Can't believe I forgot this in the initial implementation

[codecov]

Codecov Report

Merging #107 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #107   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          16     16           
  Lines         293    303   +10     
  Branches       57     61    +4     
=====================================
+ Hits          293    303   +10

Impacted Files	Coverage Δ
src/middlewares/ssm.js	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update be4179e...eb81af8. Read the comment docs.

[lmammino]

Sounds awesome! Can you make sure to increase the coverage to make the coverage test pass?

Aside from that I'b be happy with the changes

[vladholubiev]

@lmammino sure, back to 💯 again!

[lmammino]

Awesome, I'll version bump and get this published

[vladholubiev]

@lmammino ⚡️ fast, thanks!