Update jms/serializer requirement from ^3.5 to ^3.6

[dependabot-preview]

Updates the requirements on jms/serializer to permit the latest version.

Release notes

Sourced from jms/serializer's releases.

3.6.0

Implemented enhancements:

• do not hide Exceptions from custom handlers but correctly handle null #1169 (Hikariii)
• Handle ObjectConstructor returning NULL #1172 (jankramer)

Fixed bugs:

• Handle discriminator groups #1175 (goetas)

Merged pull requests:

• test serializing entity that uses Discriminator and extends some base… #1174 (FrKevin)
• test symfony translator contract #1171 (goetas)

Changelog

Sourced from jms/serializer's changelog.

3.6.0 (2020-03-21)

Implemented enhancements:

• DateTime parsed invalid date #1152
• do not hide Exceptions from custom handlers but correctly handle null #1169 (Hikariii)
• Handle ObjectConstructor returning NULL #1172 (jankramer)

Fixed bugs:

• Handle discriminator groups #1175 (goetas)

Closed issues:

• Serialize using interface metadata #1170
• thrown Exceptions are hidden when serializing complex objects with a handler #1168

Merged pull requests:

• test serializing entity that uses Discriminator and extends some base… #1174 (FrKevin)
• test symfony translator contract #1171 (goetas)

3.5.0 (2020-02-22)

Implemented enhancements:

• Improved return type for fluent methods in Context #1162 (wouterj)
• Handle array format for dateHandler #1108 (VincentLanglet)

Fixed bugs:

• Make sure serialzation context is immutable #1159 (goetas)

Merged pull requests:

• Allow for newer PHPUnit #1166 (sanmai)
• [Docs] Explain recursion in FileLocator #1155 (ruudk)
• Changed CI environment to stable PHP 7.4 #1153 (grogy)

3.4.0 (2019-12-14)

Implemented enhancements:

• Symfony 5.0 compatibility #1145 (goetas)
• Support new doctrine ODM proxy objects #1139 (notrix)
• Update major version that v2.x deprecation will be removed #1134 (carusogabriel)
• Visitor interfaces in handlers #1129 (derzkiy)

Closed issues:

• [Improvement] Ability to define a global exclusion_policy: ALL for all classes. #1144

... (truncated)

Commits

• e82527c prepare 3.6.0
• 054c136 Merge pull request #1172 from jankramer/fix/graph-navigator-type-error
• 4125166 Merge pull request #1175 from schmittjoh/FrKevin-master
• 1e364e0 support discriminator groups
• 2f5073b test serializing entity that uses Discriminator and extends some base model c...
• a9a4b0c Handle ObjectConstructor returning NULL
• 25a829b Merge pull request #1171 from schmittjoh/translator-tests
• 8f3f71b test symfony translator contract
• 80c71ca Merge pull request #1169 from Hikariii/customHandlerExceptions
• 61eb3d7 do not hide Exceptions from custom handlers but correctly handle null
• See full diff 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.

---

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 close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor 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)
• 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)