refactor(*): remove most pubsweet dependencies

See merge request !87

refactor(*): remove pubsweet-server dependency

See merge request !83

fix(server): andle oauth refresh token having 0 as its expiration value

See merge request !86

feat(*): add activity log service

See merge request !55

fix(server): fix identity-tokens circular dependency

See merge request !85

fix(server): handle access token becoming invalid before expiration

See merge request !84

Allow files without mimetype to be uploaded

See merge request !81

feat(*): add new env variable for separate s3 delete operations

See merge request !80

fix(models): force lowercase emails in identity find methods

See merge request !47

fix(models): remove non-existent user.email field from api

See merge request !79

feat(server): expose sanitized clientUrl and serverUrl

See merge request !78

feat(server): remove trailing slashes from client url

See merge request !77

fix(server): correctly update existing oauth identities

See merge request !76

fix(*): duplicate identity crashes server

See merge request !75

feat(models): add optional status on updateMembershipByTeamId

See merge request !66