fix: gridjs duplicate plugin error when updating config

[fpaz]

Resolves: #1291

Issue:

• using gridjs-react. When mounting and unmounting the grid component the gridjs complains about duplicate plugins in the config.
  solution:
• clear the config plugin list before adding new ones when updating the config.

[nflnsr]

still not fixed yet :(

[safwansamsudeen]

Hey, as mentioned in the issue, this is happening to me with Svelte.