Update pyparsing requirement from <2.3.1 to <3.1.5

Updates the requirements on [pyparsing](https://github.com/pyparsing/pyparsing) to permit the latest version.
- [Release notes](https://github.com/pyparsing/pyparsing/releases)
- [Changelog](https://github.com/pyparsing/pyparsing/blob/master/CHANGES)
- [Commits](pyparsing/pyparsing@pyparsing_1.5.2...3.1.4)

---
updated-dependencies:
- dependency-name: pyparsing
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -93,7 +93,7 @@ oauthlib==3.2.2
 pylti==0.7.0
 django-lti-provider==1.0.0
 
-pyparsing<2.3.1
+pyparsing<3.1.5
 edtf<=3.0.0
 
 pbr==6.1.0 # bandit