meta: add .github config for ISSUE_TEMPLATE/CODEOWNERS/PR_TEMPLATE (#754)

Signed-off-by: Matthew McGinn <[email protected]>

Author: xginn8

.github/CODEOWNERS

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+* @aviau @sebito91 @xginn8

.github/ISSUE_TEMPLATE.md

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+- **InfluxDB version:** e.g. 1.7.7 (output of the `influx version` command)
+- **InfluxDB-python version:** e.g. 5.2.2 (output of the `python -c "from __future__ import print_function; import influxdb; print(influxdb.__version__)"` command)
+- **Python version:** e.g. 3.7.4 (output of the `python --version` command)
+- **Operating system version:** e.g. Windows 10, Ubuntu 18.04, macOS 10.14.5

.github/PULL_REQUEST_TEMPLATE.md

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+---
+##### Contributor checklist
+<!-- For completed items, change [ ] to [x].  -->
+- [ ] Builds are passing
+- [ ] New tests have been added (for feature additions)