chore: bump version to 0.19.0

[alexander-fenster]

Releasing v0.19.0.

---

Features

This is a minor release that updates v1p2beta1 code and adds a new sample of scanning the pdf file. The default endpoint is still v1, and there are no incompatible changes.

---

• Tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

[codecov]

Codecov Report

Merging #51 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #51   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      2           
  Lines          75     75           
=====================================
  Hits           75     75

---

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 a490466...d119237. Read the comment docs.