Release v1.0.1503

Release version v1.0.1503

Metacello new
    baseline: 'GToolkitForPharo9';
    repository: 'github://feenkcom/gtoolkit:v1.0.1503/src';
    load

All commits (including upstream repositories) since last build:
https://github.com/feenkcom/lepiter/commit/e4f3a4 by Oscar Nierstrasz
Added paragraphStyle to comment snippet feenkcom/gtoolkit#4289