[Snyk] Security upgrade ioredis from 1.15.1 to 2.0.0

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	758/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 7.3	Prototype Pollution SNYK-JS-LODASH-608086	Yes	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: ioredis

The new version differs by 112 commits.

• c941362 chore(release): v2.0.0
• c735dcf docs(CHANGELOG): v2.0.0
• 236da27 perf: improve the performance of checking flags (#312)
• 5c2e119 chore(eslint): upgrade eslint config for the new version
• 423f91f Fix typo in connection test file (#311)
• 3d6c811 docs(README): update contributors
• a0d5b25 feat: include source and database in monitor events (#308)
• 6ee56b2 Merge pull request #300 from dguo/patch-1
• fc616b5 docs(README): add warning for key prefixing with some commands
• 79b9feb Merge pull request #299 from spiffytech/master
• c9a6f91 Add example of changing Redis server config
• ce50f9a Merge pull request #297 from TeeAaTeeUu/master
• 8ea5004 set 'dropBufferSupport' true for temporary connections in sentinel_connector
• eb21cf2 chore(release): v2.0.0-rc4
• 8bf2735 docs(CHANGELOG): v2.0.0-rc4
• 9e08f01 test: fix test for auth
• 097fdbc feat: print logs for unhandled error event
• be8d28e test: fix test for select command
• a87f405 feat: add support for Node.js v6 (#295)
• a5acc61 Merge branch 'feat/auth-error'
• 56cb047 Merge branch 'master' into feat/auth-error
• dfdebfe fix: won't emit error again when password is wrong
• 8f3bb6a fix: dropBufferSupport not support selecting database
• 3561fab fix: reconnect when ready check failed

See the full diff

Check the changes in this PR to ensure they won't cause issues with your project.

---

Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.

For more information:
🧐 View latest project report

🛠 Adjust project settings

📚 Read more about Snyk's upgrade and patch logic

---

This change is