Install spacy<2.3.3 for Python 2 (#1706)
Install spacy<2.3.3 for Python 2 (#1706)

* Install blis<0.7.3 for Python 2

Installation of `blis==0.7.3` fails on Debian machines building wheel.

* Try avoiding latest spaCy

* Revert "Try avoiding latest spaCy"

This reverts commit 84ff3f77c105b95f2857cac94b7b757a138a8fe9.

* spacy==2.3.2 might work

* Update requirements.txt
mitdbg/modeldb,mitdbg/modeldb,mitdbg/modeldb,mitdbg/modeldb,mitdbg/modeldb