Fix library parser to trim trailing LF (#380)

* Fix test fixture for update requirement pattern

* Fix to parse update fragment with considering "\n"

* `npm run build`

src/dependabot/update_metadata.ts

@@ -29,7 +29,7 @@ export interface scoreLookup {
 
 export async function parse (commitMessage: string, body: string, branchName: string, mainBranch: string, lookup?: alertLookup, getScore?: scoreLookup): Promise<Array<updatedDependency>> {
   const bumpFragment = commitMessage.match(/^Bumps .* from (?<from>v?\d[^ ]*) to (?<to>v?\d[^ ]*)\.$/m)
-  const updateFragment = commitMessage.match(/^Update .* requirement from \S*? ?(?<from>v?\d[^ ]*) to \S*? ?(?<to>v?\d[^ ]*)$/m)
+  const updateFragment = commitMessage.match(/^Update .* requirement from \S*? ?(?<from>v?\d\S*) to \S*? ?(?<to>v?\d\S*)$/m)
   const yamlFragment = commitMessage.match(/^-{3}\n(?<dependencies>[\S|\s]*?)\n^\.{3}\n/m)
   const newMaintainer = !!body.match(/Maintainer changes/m)
   const lookupFn = lookup ?? (() => Promise.resolve({ alertState: '', ghsaId: '', cvss: 0 }))

src/main.test.ts

@@ -208,6 +208,7 @@ test('it sets the updated dependency as an output for subsequent actions when th
 test('it sets the updated dependency as an output for subsequent actions when given a commit message for library', async () => {
   const mockCommitMessage =
     'Update rubocop requirement from ~> 1.30.1 to ~> 1.31.0\n' +
+    '\n' +
     'Updates the requirements on [rubocop](https://github.com/rubocop/rubocop) to permit the latest version.\n' +
     '- [Release notes](https://github.com/rubocop/rubocop/releases)\n' +
     '- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)\n' +