Add param test, fix formatting (spaces to tabs)

[stereosteve]

• Example test of using a parameter per docs
• Fix some indentation spaces -> tabs

related: #30

[codecov-io]

Codecov Report

Merging #47 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #47   +/-   ##
=======================================
  Coverage   88.65%   88.65%           
=======================================
  Files           6        6           
  Lines         326      326           
=======================================
  Hits          289      289           
  Misses         37       37

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[nezed]

This is very interesting usage of params.
I'll take a closer look and i think it must be presented in README.

I'm not sure is this a good way to implement something like "prepared statements" or "escaped params" because of params implementations in CH HTTP interface.

Also as a part of #37 i'll cleanup codebase soon, so you will be able to push just a usefuls changes 🙃