Release v1.0.1220

Release version v1.0.1220

Metacello new
    baseline: 'GToolkitForPharo9';
    repository: 'github://feenkcom/gtoolkit:v1.0.1220/src';
    load

All commits (including upstream repositories) since last build:
https://github.com/feenkcom/gtoolkit/commit/1108da by Alistair Grant
[feenkcom/gtoolkit#4072] Add basic support for strict symbol comparisons

Includes functionality that is required early in the build.