GH #1756 - Update argschema

[djkapner]

Overview:

Updating to the latest argschema release, out since January 2020.

Changes:

• pins to latest argschema release.
• eliminates redundant marshmallow specification.

Validation:

• Github CIs pass
• AllenSDK Anaconda (Github) passes (manual run)
• AllenSDK Anaconda Nightly (Github) passes (manual run)

Checklist

• My code follows
  Allen Institute Contribution Guidelines
• My code is unit tested and does not decrease test coverage
• I have performed a self review of my own code
• My code is well-documented, and the docstrings conform to
  Numpy Standards
• I have updated the documentation of the repository where
  appropriate
• The header on my commit includes the issue number
• My Pull Request has the latest AllenSDK release candidate branch
  rc/x.y.z as its merge target
• My code passes all AllenSDK tests

Notes:

[codecov-io]

Codecov Report

Merging #1754 into rc/2.4.0 will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           rc/2.4.0    #1754   +/-   ##
=========================================
  Coverage     36.16%   36.16%           
=========================================
  Files           346      346           
  Lines         33817    33817           
=========================================
  Hits          12229    12229           
  Misses        21588    21588           

---

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 21197b9...c747440. Read the comment docs.

[kschelonka]

Did you happen to run any of the bamboo tests on prem? That's what I'm mostly concerned about

[djkapner]

Did you happen to run any of the bamboo tests on prem? That's what I'm mostly concerned about

yes, see the links listed under Validation

[kschelonka]

Oh awesome, glazed over that. My b. thanks!