BOT: Dart Dependency Updater

[jpeiffer]

PR created automatically

dev_dependencies:

• test: 1.25.7 --> 1.25.8

Analysis Successful

dependencies:

• json_class: 3.0.0+15 --> 3.0.0+16

Analysis Successful

dependencies:

• form_validation: 3.1.1+7 --> 3.1.1+8
• json_class: 3.0.0+15 --> 3.0.0+16
• json_conditional: 3.0.1+15 --> 3.0.1+17
• json_schema: 5.1.7 --> 5.2.0

Analysis Successful

dependencies:

• json_class: 3.0.0+15 --> 3.0.0+16

Analysis Successful