Have generic updater support numbers without breaks

[jeremytchang]

I'm looking to support go major versioning where in a go.mod file last part of the module path must be the major version with v prefixed.

// x-release-please-start-major
module github.com/jeremytchang/test-release-please-go/go/v4

// x-release-please-end

go 1.14

Currently, the generic updater can only update the major version if it is a number by itself. The regex: /\b\d+\b/

release-please/src/updaters/generic.ts

Line 21 in c97598c

const SINGLE_VERSION_REGEX = /\b\d+\b/;

What do you all think of simplifying it to just /\d+/ example or /\bv?d+\b/ example or something along those lines.

It would still support the current use case. Though it could break current implementations that have a line like blah/12/blah 12 where both 12's will be replaced.

[ammmze]

I would also like something like this but for a custom action for Github Actions. I'd like to use it to keep the code sample in the readme current with the major version. However, in my case, i'd like those markings to be outside the code block so they are hidden when viewing the readme, but if the pattern was just looking for a number, it would match other things easily that it shouldn't match. I think it would be neat if the markers/tags allowed for a custom pattern with a capture like the following:

<!-- x-release-please-start-major pattern="v(\d+)" -->
```yaml
- uses: ammmze/example@v1
  with:
    project-id: 100
```
<!-- x-release-please-end -->

[t3mi]

I'd agree that regex should be changed for single digit as behavior for it doesn't match the one for the full version value

@ammmze your case could already be covered with some hack assuming its only markdown in GitHub:

<pre lang="yaml">
- uses: ammmze/example@&#x0076;1 <!-- x-release-please-major -->
  with:
    project-id: 100
</pre>

• using html tags for syntax highlighting along with the html comment wont produce the comment in the rendered output
• switch letter v to the unicode value of v to please the current regex pattern for single version part update allows major version upgrades for example