v1.9.7 Bugfix-Release

This is a bugfix which addresses the problem for the falsely released version 1.9.5, which is not compatible with Nextcloud 19

Details:

• this version is identically to version 1.8.3 (downgrade)
• only compatible with Nextcloud 19
• This update removes the possibly created columns
  • allow_proposals in polls_polls,
  • use_no in polls_polls,
  • proposals_expire in polls_polls,
  • owner in polls_options and
  • released in polls_options

Additionally change to prevent #1723, since the migrationService doesn't allow notNull=true and default='' anymore.

To update the polls version manually:

• disable polls
• delete ../apps/polls in your Nextcloud installation
• extract the contents of the package (after it is available) to ../apps in your Nextcloud installation, You should find a fresh created folder pollsin your apps folder
• enable polls

Tested with NC19 and an upgrade path 1.8.3 -> 1.9.5 -> 1.9.7