Bump version on master to 3.0.0-dev.1.
Bump version on master to 3.0.0-dev.1.

mozilla/nunjucks,devoidfury/nunjucks,internalfx/nunjucks,oddbird/nunjucks,devoidfury/nunjucks,kevinschaul/nunjucks,oddbird/nunjucks,kevinschaul/nunjucks,internalfx/nunjucks,internalfx/nunjucks,oddbird/nunjucks,internalfx/nunjucks,devoidfury/nunjucks,kevinschaul/nunjucks,kevinschaul/nunjucks,mozilla/nunjucks,mozilla/nunjucks,oddbird/nunjucks