doReleaseNotesExist method
checks the change log to see if the release notes for version
have already been generated.
Implementation
bool doReleaseNotesExist(Version version) {
if (!exists(changeLogPath)) {
touch(changeLogPath, create: true);
}
final note = '# ${version.toString()}';
return read(changeLogPath).toList().join('\n').contains(note);
}