Fix for issue #36 and cypress e2e tests for lazy loading and lqip

[eco-line]

Tasks done in this PR

• Issue IKImage not rendering after upload using Hooks #36 fixed
• Added test cases for IKContext, IKImage, and IKUpload component, where props change should change url accordingly
• Updated sample app to include a case which updates state through props
• test-app created in samples/ folder for e2e testing
• Cypress e2e test cases

Acceptance criteria

• unit tests should pass npm run test:ci
• e2e tests should pass npm run test:e2e
• All Image components should render in the sample app and the button Click to apply radius should apply a radius to the above image, last upload button should render the uploaded image after a successful upload

[codecov]

Codecov Report

Merging #40 (bfc2c76) into master (d2d77d9) will not change coverage.
The diff coverage is 100.00%.

❗ Current head bfc2c76 differs from pull request most recent head 81b8b0e. Consider uploading reports for the commit 81b8b0e to get more accurate results

@@            Coverage Diff            @@
##            master       #40   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         6           
  Lines          139       150   +11     
  Branches        37        39    +2     
=========================================
+ Hits           139       150   +11     

Impacted Files	Coverage Δ
src/components/IKImage/index.js	100.00% <100.00%> (ø)

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