PR for v.1.4.2

[hcpchris]

• Closes #43

[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (5e250a6) 93.01% compared to head (9026413) 93.00%. Report is 1 commits behind head on master.

:exclamation: Current head 9026413 differs from pull request most recent head 6b7fdaa. Consider uploading reports for the commit 6b7fdaa to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #45 +/- ## ========================================== - Coverage 93.01% 93.00% -0.01% ========================================== Files 283 283 Lines 11539 11554 +15 Branches 419 421 +2 ========================================== + Hits 10733 10746 +13 - Misses 670 671 +1 - Partials 136 137 +1 ``` | [Files](https://app.codecov.io/gh/highcharts-for-python/highcharts-stock/pull/45?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=highcharts-for-python) | Coverage Δ | | |---|---|---| | [highcharts\_stock/options/series/flags.py](https://app.codecov.io/gh/highcharts-for-python/highcharts-stock/pull/45?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=highcharts-for-python#diff-aGlnaGNoYXJ0c19zdG9jay9vcHRpb25zL3Nlcmllcy9mbGFncy5weQ==) | `92.85% <88.23%> (-7.15%)` | :arrow_down: |

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