[GRASS-git] [OSGeo/grass] 98347d: t.upgrade: added from addons (#1438)

[Markus Neteler]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: 98347de41fef20fc677dd55e32eb283c3bc645c1
      https://github.com/OSGeo/grass/commit/98347de41fef20fc677dd55e32eb283c3bc645c1
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2021-03-15 (Mon, 15 Mar 2021)

  Changed paths:
    M temporal/Makefile
    A temporal/t.upgrade/Makefile
    A temporal/t.upgrade/t.upgrade.html
    A temporal/t.upgrade/t.upgrade.py

  Log Message:
  -----------
  t.upgrade: added from addons (#1438)

* t.upgrade: added from addons
- copied from https://github.com/OSGeo/grass-addons/tree/master/grass7/temporal/t.upgrade
* Windows: fix t.upgrade call
* change grass.temporal to lazy import
* remove UTF-8 coding line
* black: blank line after import
* revert CI related changes
* module description fixed
* Year pedantry
* import grass.script as gs
* no need for sys.exit()
* global variables options and flags are not used

Co-authored-by: Vaclav Petras <wenzeslaus at gmail.com>
Co-authored-by: Martin Landa <landa.martin at gmail.com>