Thera-py

- Install dependencies with pip
- Add unmerged normalize endpoint
- Correct ChEMBL withdrawn flag type mistake
- Updated requirements to remove security vulnerabilities

- Refactor jupyter notebooks in analysis
- Bump jupyter-server from 1.13.4 to 1.15.4

* ChEMBL changes:
* Capture disease indications and both withdrawn flag and max_phase
* Correct trade_name extraction
* Refactor ETL methods
* Provide option to inhibit auto-download of latest source data
* Update drug approval/indication object structure
* Security updates
* Make method APIs consistent with other normalizers
* Enable parameter entry in SwaggerUI by default
* Make OpenAPI schema conform to protocol standards

* Bugfix in query results
* Security updates

* Ensure no leading/trailing whitespace in DB record values

* Add new sources: IUPHAR Guide to PHARMACOLOGY, DrugsFDA
* Breaking changes to regulatory approval API response objects and values
* Use latest available version of all source data
* Refactor ETL methods to share functions
* Add ChEMBL data to normalized results
* Add infer namespace option + relevant warnings to API responses
* Enable standalone `--update_merge` option in CLI
* Misc style/CI updates
* Misc bugfixes and namespace updates