Please check if the PR fulfills these requirements

[x] The commit message follows our guidelines: https://github.com/wc-catalogue/blaze-elements/blob/master/docs/CONTRIBUTING.md#commit
[x] There are no linting errors and code is properly formatted (your run before push yarn ts:format && yarn ts:lint:fix)
[ ] Tests for the changes have been added (for bug fixes / features)
[ ] Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x")

[x] Bugfix
[ ] Feature
[x] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[x] Build related changes
[ ] CI related changes
[ ] Other... Please describe:

What is the current behavior? (You can also link to an open issue here)

228, #297, #299, #300, #303, #304

What is the new behavior?

stricter lint rules
refactored code to pass new rules

Does this PR introduce a breaking change? (check one with "x")

[ ] Yes
[x] No

NOTE:

this will be rebased and merged via github ( every commit is atomic and closes particular issue )

wc-catalogue / blaze-elements

tslint rules updates + tsc bug fixes #298

228, #297, #299, #300, #303, #304