feat: introduce jest matchers

[jurijzahn8019]

Adds jest matchers intended to simplify usage of expects

Matchers will be only added if expect.extend function is present.

Fixes #96

[jurijzahn8019]

Hello @m-radzikowski,

this is just a ping 😄

[m-radzikowski]

Thanks again for the contribution! Please see my comments on the code.

[jurijzahn8019]

Hi @m-radzikowski, i have made requested chenges :)

[m-radzikowski]

Looks good, thank you. Please see the build fail on types check.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@c66e050). Click here to learn what that means.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##             main       #97   +/-   ##
========================================
  Coverage        ?   100.00%           
========================================
  Files           ?         7           
  Lines           ?       165           
  Branches        ?        22           
========================================
  Hits            ?       165           
  Misses          ?         0           
  Partials        ?         0           

Impacted Files	Coverage Δ
src/awsClientStub.ts	100.00% <100.00%> (ø)
src/index.ts	100.00% <100.00%> (ø)
src/jestMatchers.ts	100.00% <100.00%> (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 c66e050...7f3fb04. Read the comment docs.