Dcicwrangling

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`PR:103 Various needed updates <https://github.com/4dn-dcic/dcicwrangling/pull/103>_`

* Update the version numbers for ChIP-seq pipeline update in functions/cleanup.py
* Update Makefile to use newer version of poetry and publish with new dcicutils script
* add tag-and-push script to commands
* update the github action publish
* Update pyproject.toml to use new dcicutils version
* Relock the dependencies in poetry.lock

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* Update to ubuntu version 20.04 for running github workflows

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* Update the version of dcicutils used to go along with es upgrade
* Tweak to GEO dbxref notebook to prevent accidentally adding the same accession more than once

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* Add new useful notebook to help in adding GEO/SRA dbxrefs to items

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* Bug fix in notebook 04: expsets were not unique in publication.

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* Bug fix in notebook 04: ``exp_sheet`` was missing.
* Up to 5 channels are supported now.