Bump gson from 2.8.2 to 2.8.5 in /dockerfile-image-update

[dependabot-preview]

Bumps gson from 2.8.2 to 2.8.5.

Changelog

Sourced from gson's changelog.

Version 2.8.5

2018-05-21 GitHub Diff

• Print Gson version while throwing AssertionError and IllegalArgumentException
• Moved utils.VersionUtils class to internal.JavaVersion. This is a potential backward incompatible change from 2.8.4
• Fixed issue #1310 by supporting Debian Java 9

Version 2.8.4

2018-05-01 GitHub Diff

• Added a new FieldNamingPolicy, LOWER_CASE_WITH_DOTS that mapps JSON name someFieldName to some.field.name
• Fixed issue #1305 by removing compile/runtime dependency on sun.misc.Unsafe

Version 2.8.3

2018-04-27 GitHub Diff

• Added a new API, GsonBuilder.newBuilder() that clones the current builder
• Preserving DateFormatter behavior on JDK 9
• Numerous other bugfixes

Commits

• f649e05 [maven-release-plugin] prepare release gson-parent-2.8.5
• 4c685b2 Private constructor (#1324)
• d84e26d Issue 1242: Printing Gson version when throwing AssertionError and IllegalArg...
• 1215841 Merge pull request #1281 from greatjack1/master
• 3547420 Merge branch 'master' into master
• a6890bb Fixed #1310 (#1311)
• 57085d6 2.8.4 README
• f2dd56d 2.8.4 changelog
• f77615e 2.8.4
• d8857cd updated release process to the current steps
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Note: This repo was added to Dependabot recently, so you'll receive a maximum of 5 PRs for your first few update runs. Once an update run creates fewer than 5 PRs we'll remove that limit.

You can always request more updates by clicking Bump now in your Dependabot dashboard.

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot ignore this [patch|minor|major] version will close this PR and stop Dependabot creating any more for this minor/major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
• @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
• @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
• @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language
• @dependabot badge me will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot dashboard:

• Update frequency (including time of day and day of week)
• Automerge options (never/patch/minor, and dev/runtime dependencies)
• Pull request limits (per update run and/or open at any time)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)

Finally, you can contact us by mentioning @dependabot.

---

[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @dependabot-bot to sign the Salesforce.com Contributor License Agreement.

[coveralls]

Coverage remained the same at 71.572% when pulling 1bc1576 on dependabot/maven/dockerfile-image-update/com.google.code.gson-gson-2.8.5 into f0b6e83 on master.