feat(debounce): add debounce to connection message in background

[sk91]

Allows to debounce posting messages to connection in background

[codecov-io]

Codecov Report

Merging #12 into master will decrease coverage by 6.89%. The diff coverage is 66.66%.

@@           Coverage Diff            @@
##           master     #12     +/-   ##
========================================
- Coverage     100%   93.1%   -6.9%     
========================================
  Files           3       4      +1     
  Lines          47      58     +11     
========================================
+ Hits           47      54      +7     
- Misses          0       4      +4

Impacted Files	Coverage Δ
src/background-store.js	100% <100%> (ø)	:arrow_up:
src/utils.js	20% <20%> (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 5cdd349...a6b67dd. Read the comment docs.