[FEATURE] Update D2V, AutoTokenizer, and pretraining scripts

[KenelmQLH]

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Description

(Brief description on what this PR is about)

What does this implement/fix? Explain your changes.

...

Pull request type

• [ ] [DATASET] Add a new dataset
• [ ] [BUGFIX] Bugfix
• [x] [FEATURE] New feature (non-breaking change which adds functionality)
• [ ] [BREAKING] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] [STYLE] Code style update (formatting, renaming)
• [ ] [REFACTOR] Refactoring (no functional changes, no api changes)
• [ ] [BUILD] Build related changes
• [ ] [DOC] Documentation content changes
• [ ] [OTHER] Other (please describe):

Changes

1. Update D2V: support for token vectors
2. Add AutoTokenizer
3. Update pretraining scripts for Disenq and QuesNet

Does this close any currently open issues?

N/A

Any relevant logs, error output, etc?

N/A

Checklist

Before you submit a pull request, please make sure you have to following:

Essentials

• [x] PR's title starts with a category (e.g. [BUGFIX], [FEATURE], [BREAKING], [DOC], etc)
• [x] Changes are complete (i.e. I finished coding on this PR)
• [x] All changes have test coverage and al tests passing
• [x] Code is well-documented (extended the README / documentation, if necessary)
• [x] If this PR is your first one, add your name and github account to AUTHORS.md

Comments

• If this change is a backward incompatible change, why must this change be made.
• Interesting edge cases to note here

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 93.27586% with 39 lines in your changes are missing coverage. Please review.

Project coverage is 97.31%. Comparing base (598d788) to head (84b79c7).

Files	Patch %	Lines
EduNLP/Pretrain/quesnet_vec.py	91.26%	11 Missing :warning:
EduNLP/Pretrain/disenqnet_vec.py	90.41%	7 Missing :warning:
EduNLP/I2V/i2v.py	71.42%	6 Missing :warning:
EduNLP/ModelZoo/hf_model/hf_model.py	96.07%	4 Missing :warning:
EduNLP/Vector/gensim_vec.py	82.35%	3 Missing :warning:
EduNLP/SIF/tokenization/formula/ast_token.py	86.66%	2 Missing :warning:
EduNLP/SIF/tokenization/tokenization.py	71.42%	2 Missing :warning:
EduNLP/ModelZoo/quesnet/quesnet.py	96.42%	1 Missing :warning:
EduNLP/Pretrain/elmo_vec.py	95.00%	1 Missing :warning:
EduNLP/Pretrain/hugginface_utils.py	90.00%	1 Missing :warning:
... and 1 more

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #155 +/- ## ========================================== - Coverage 97.81% 97.31% -0.51% ========================================== Files 80 84 +4 Lines 4349 4650 +301 ========================================== + Hits 4254 4525 +271 - Misses 95 125 +30 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[nnnyt]

The test coverage seems to drop a lot. Try adding more tests for your new code