fix: add examples, fix README, fix typo

[VineyAT]

Description

• Add example for Pubsub pattern
• fix the wording in README
• fix typo

[codecov]

Codecov Report

Merging #7 (e536aae) into master (298c2ee) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #7   +/-   ##
=======================================
  Coverage   88.33%   88.33%           
=======================================
  Files          11       11           
  Lines         540      540           
=======================================
  Hits          477      477           
  Misses         35       35           
  Partials       28       28           

Impacted Files	Coverage Δ
cache.go	83.33% <ø> (ø)
interface.go	100.00% <ø> (ø)

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