Add phone number to user accounts.

[plunkettgoogle]

Issue

• Closes [Email/SMS] Add phone number field in db #702
• This change is a dependency for another issue
• This change has a dependency from another issue

Description

This change adds a phone number to the user_account table, adds the corresponding migration, and updates the swagger API.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Prototype/POC (not to merge)
• This change is a refactor/address technical debt
• This change requires a documentation update
• This change requires a SQL Script

How Can This Be Tested/Reviewed?

1. Go to http://localhost:3100/docs and use the auth/login endpoint to log in as one of the test accounts.
2. Use the auth token to set the bearer token for subsequent requests (click the lil' "lock" icon, and paste the auth token)
3. GET the user JSON through the user endpoint
4. Paste the user JSON into the request body of the PUT user/{id} endpoint, and modify the phone number field
5. GET the user JSON again through the user endpoint, and verify the phone number was set.

• Desktop View
• Mobile View
• Test A
• Test B

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have reviewed the changes in a desktop view
• I have reviewed the changes in a mobile view
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have assigned reviewers
• I have updated the changelog to include a description of my changes
• I have run yarn generate:client if I made backend changes

[GabeBenjamin]

LGTM!