Bump taler from 0.2.0 to 0.3.0

Bumps [taler](https://github.com/openfoodfoundation/taler-ruby) from 0.2.0 to 0.3.0.
- [Changelog](https://github.com/openfoodfoundation/taler-ruby/blob/main/CHANGELOG.md)
- [Commits](https://github.com/openfoodfoundation/taler-ruby/compare/v0.2.0...v0.3.0)

---
updated-dependencies:
- dependency-name: taler
  dependency-version: 0.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -898,7 +898,7 @@ GEM
       faraday (~> 2.0)
       faraday-follow_redirects
     sysexits (1.2.0)
-    taler (0.2.0)
+    taler (0.3.0)
     temple (0.10.4)
     terminal-table (4.0.0)
       unicode-display_width (>= 1.1.1, < 4)