Version bump tries to bump all matching of `version =` in pyproject.toml

The problem

With version 7.3.0:

In pyproject.toml, the version of the main package is defined as version = 1.2.3 but some dependencies can be defined as such pyarrow = {version = "0.17.0", extras = [ "pandas" ] } and then semantic release is either bumping both version = the the computed version or trowing an error such as:

semantic-release version --patch
Creating new version
error: found conflicting versions: '1.2.3', '0.17.0'

Expected behavior

semantic release only bump the root version of the package and nothing in the dependencies section.

Additional context

Here is an example of pyproject.toml that you can use to reproduce

[tool.poetry]
name = "potatoes"
version = "1.2.3"
description = "I love potatoes"
authors = ["Potatoes <[e-mail]>"]

[tool.poetry.dependencies]
python = "^3.8"
pyarrow = {version = "0.17.0", extras = [ "pandas" ] }

[tool.semantic_release]
version_variable = "pyproject.toml:version"
upload_to_pypi = false
commit_message = "Version generated by python-semantic-release [ci skip]"

[danth]

I suggest we change the regular expression for version_variable to only match at the start of a line:

https://github.com/relekang/python-semantic-release/blob/da20b9bdd3c7c87809c25ccb2a5993a7ea209a22/semantic_release/history/__init__.py#L41-L49

[Cielquan]

As pyproject.toml is a config file for not only packaging there are other tools that also have a blank version= setting like commitizen:

[tool.commitizen]
name = "cz_conventional_commits"
version = "0.5.2"
tag_format = "$version"
version_files = ["pyproject.toml:version"]

I think a regex approach for pyproject.toml is not good enough and would propose to use a toml library like tomlkit to actually load the toml file and extract the correct version. And of cause dump the bumped one afterwards.

The semantic-release config could then be like the following with two colons: <file : section : key>

[tool.semantic_release]
version_variable = ["pyproject.toml:tool.poetry:version"]

If 2 colons and file is *. toml: load it and extract elif 1 colon: regex and extract else: error

PS: I don’t know how commitizen solves the problem as they have version_files = ["pyproject.toml:version"] and it works.