Track ACIS-S observations which can go to -109 C (bugfix)

What's Changed

• Fix bugs in new -109 C limit implementation by @jzuhone in #35

Full Changelog: 3.8.0...3.8.1

Includes the following merges:

• PR #35: Fix bugs in new -109 C limit implementation

Track ACIS-S observations which can go to -109 C

Includes the following merges:

• PR #34: Identify and check observations that can go to -109 C

summer 2021 ACIS FP model recalibration (redo)

3.7.0

Merge pull request #33 from jzuhone/new_json_for_real

summer 2021 ACIS FP model recalibration

Includes the following merges:

• PR #32: 2021 ACIS FP recalibration

Move conftest to use testr

Includes the following merges:

• PR #31: Move conftest for tests

Simplification of code, use cxotime, fixing bugs with violations reporting

Includes the following merges:

• PR #29: Simplification of code, use cxotime, fixing bugs with violations reporting

New test answers post-shiny

Merge pull request #28 from jzuhone/update_answers

Update answers post-shiny

test refactor

refactor tests in response to changes in acis_thermal_check

shiny-compatible acisfp_check

Replace recarray item access with Table item access in acis_obs.py

Changes for ACIS-S observations to -109 C, track ECS observations in the science orbit and catch violations

Merge pull request #24 from jzuhone/m109

Changes for ACIS-S observations to -109 C, track ECS observations in the science orbit and catch violations