fix: adapt for latest @octokit/rest to remove deprecation warnings

[immanuel192]

• The goal of this PR to correct the deprecated param from octokit/rest.
• Calling with deprecated param will get this warning

{ Deprecation: [@octokit/rest] "number" parameter is deprecated for ".pullRequests.listCommits()". Use "pull_number" instead
    at Object.keys.forEach.key (/Users/sbtrung/.nvm/versions/node/v10.12.0/lib/node_modules/semantic-release/node_modules/@octokit/rest/plugins/register-endpoints/register-endpoints.js:73:26)
    at Array.forEach (<anonymous>)
    at Object.patchedMethod [as listCommits] (/Users/sbtrung/.nvm/versions/node/v10.12.0/lib/node_modules/semantic-release/node_modules/@octokit/rest/plugins/register-endpoints/register-endpoints.js:69:26)
    at pFilter (/Users/sbtrung/.nvm/versions/node/v10.12.0/lib/node_modules/semantic-release/node_modules/@semantic-release/github/lib/success.js:54:36)
    at pMap (/Users/sbtrung/.nvm/versions/node/v10.12.0/lib/node_modules/semantic-release/node_modules/p-filter/index.js:5:46)
    at Promise.resolve.then.el (/Users/sbtrung/.nvm/versions/node/v10.12.0/lib/node_modules/semantic-release/node_modules/p-map/index.js:46:16) name: 'Deprecation' }
{ Deprecation: [@octokit/rest] "number" parameter is deprecated for ".issues.createComment()". Use "issue_number" instead
    at Object.keys.forEach.key (/Users/sbtrung/.nvm/versions/node/v10.12.0/lib/node_modules/semantic-release/node_modules/@octokit/rest/plugins/register-endpoints/register-endpoints.js:73:26)
    at Array.forEach (<anonymous>)
    at Object.patchedMethod [as createComment] (/Users/sbtrung/.nvm/versions/node/v10.12.0/lib/node_modules/semantic-release/node_modules/@octokit/rest/plugins/register-endpoints/register-endpoints.js:69:26)
    at Promise.all.uniqBy.map (/Users/sbtrung/.nvm/versions/node/v10.12.0/lib/node_modules/semantic-release/node_modules/@semantic-release/github/lib/success.js:86:37)
    at Array.map (<anonymous>)
    at module.exports (/Users/sbtrung/.nvm/versions/node/v10.12.0/lib/node_modules/semantic-release/node_modules/@semantic-release/github/lib/success.js:74:45) name: 'Deprecation' }

• The original code from octokit/rest is : https://github.com/octokit/rest.js/blob/master/plugins/register-endpoints/register-endpoints.js#L73

[gr2m]

Thanks Trung!

[semantic-release-bot]

🎉 This PR is included in version 5.3.2 🎉

The release is available on:

• npm package (@next dist-tag)
• GitHub release

Your semantic-release bot 📦🚀