chore: bump version to 0.42.0

[xmfcx]

Description

Bumps the version.

↪️ Once this is merged, I will create a PR that merges main into the humble branch.

Related:

• feat(autoware.repos): bump up autowarefoundation/autoware_core to 0.3.0, autowarefoundation/autoware_universe to 0.43.0 and autowarefoundation/autoware_launch to 0.43.0 autowarefoundation/autoware#5927 (comment)

Same as:

• chore: bump version to 0.42.0 autowarefoundation/awsim_labs_sensor_kit_launch#26
• chore: bump version to 0.42.0 autowarefoundation/single_lidar_sensor_kit_launch#11
• chore: bump version to 0.42.0 autowarefoundation/sample_sensor_kit_launch#125

@youtalk Could you review?

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