Fix import and call related to 'configob.verify'.

[csadorf]

Fixes issue #301.

Motivation and Context

Types of Changes

• Documentation update
• Bug fix
• New feature
• Breaking change¹

¹The change breaks (or has the potential to break) existing functionality.

Checklist:

• I am familiar with the Contributing Guidelines.
• I agree with the terms of the Contributor Agreement.
• My name is on the list of contributors.
• My code follows the code style guideline of this project.
• The changes introduced by this pull request are covered by existing or newly introduced tests.

If necessary:

• I have updated the API documentation as part of the package doc-strings.
• I have created a separate pull request to update the framework documentation on signac-docs and linked it here.
• I have updated the changelog and added all related issue and pull request numbers for future reference (if applicable). See example below.

Example for a changelog entry: Fix issue with launching rockets to the moon (#101, #212).

[csadorf]

@vishav1771 This should fix the bug you uncovered in #300 . Would you mind reviewing this PR?

[codecov]

Codecov Report

Merging #302 into master will not change coverage by %.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #302   +/-   ##
=======================================
  Coverage   65.15%   65.15%           
=======================================
  Files          40       40           
  Lines        5700     5700           
=======================================
  Hits         3714     3714           
  Misses       1986     1986           

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[vishav1771]

@csadorf I tried it locally. LGTM 👍