Release v1.0.507

Release version v1.0.507

Metacello new
    baseline: 'GToolkitForPharo9';
    repository: 'github://feenkcom/gtoolkit:v1.0.507/src';
    load

All commits (including upstream repositories) since last build:
https://github.com/feenkcom/lepiter/commit/500b37 by Tudor Girba
Merge 3e4cbf1d6276c2b7122051cbb0b999b4d8125013

https://github.com/feenkcom/lepiter/commit/2d5c7f by Tudor Girba
fix actions in code blocks inside text snippets: 1. make the evaluation attribute work. 2. spawn the result to the right instead of as an attribute. feenkcom/gtoolkit#3096