TOML v1.0.0 spec is not supported.

[BradenM]

1. Is this a client library issue or a product issue?
   Library

2. Did someone already solve this?
   No

3. Do you have a support contract?
   Please create an issue in the support console to ensure a timely response.

If the support paths suggested above still do not result in a resolution, please provide the following details.

Environment details

• OS: N/A
• Node.js version: N/A
• npm version: N/A
• release-please version: fa92311

Steps to reproduce

1. Create a TOML-based version target file that contains heterogeneous arrays,
   1.1.) Example pyproject.toml with a poetry valid "include" field:

[tool.poetry]
## ...
 include = [ 
   "README.md", 
   { path = "tests", format = "sdist" } 
 ] 

2. Attempt to utilize any TOML based updater (via the python strategy, in this case)

3. release-please silently fails to update the file. Running manifest via the github action reports:

❯ Fetching pyproject.toml from branch master
⚠ file pyproject.toml did not exist

Details

Release please does not support the latest TOML v1.0.0 spec (which was released Jan 2021).

This means that any TOML files utilizing features introduced in the TOML v1.0.0-rc.1 release silently fail to update.

This is caused by release-please's dependency on @iarna/toml @ v2.2.5, which only advocates support for up to TOML v0.5.0 (2018-07-26).

Please see my earlier issues and PR in renovatebot/renovate (which suffered from the same issue prior) for additional details:
renovatebot/renovate#18668
renovatebot/renovate#18670