Update symfony/polyfill* (v1.12.0 => v1.13.0)

[phil-davis]

Description

composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 8 updates, 0 removals
  - Updating symfony/polyfill-iconv (v1.12.0 => v1.13.0): Downloading (100%)         
  - Updating symfony/polyfill-php72 (v1.12.0 => v1.13.0): Downloading (100%)         
  - Updating symfony/polyfill-mbstring (v1.12.0 => v1.13.0): Downloading (100%)         
  - Updating symfony/polyfill-intl-idn (v1.12.0 => v1.13.0): Downloading (100%)         
  - Updating symfony/polyfill-util (v1.12.0 => v1.13.0): Downloading (100%)         
  - Updating symfony/polyfill-php56 (v1.12.0 => v1.13.0): Downloading (100%)         
  - Updating symfony/polyfill-ctype (v1.12.0 => v1.13.0): Downloading (100%)         
  - Updating roave/security-advisories (dev-master 40fb2c2 => dev-master 7b05f17)

https://github.com/symfony/polyfill/releases/tag/v1.13.0

Motivation and Context

Make a single PR for bulk changes like this, rather than dependabot making lots of individual PRs.

How Has This Been Tested?

CI

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE

[codecov]

Codecov Report

Merging #36485 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #36485   +/-   ##
=========================================
  Coverage     65.18%   65.18%           
  Complexity    19794    19794           
=========================================
  Files          1271     1271           
  Lines         74730    74730           
  Branches       1309     1309           
=========================================
  Hits          48712    48712           
  Misses        25632    25632           
  Partials        386      386

Flag	Coverage Δ	Complexity Δ
#javascript	54% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	66.41% <ø> (ø)	19794 <ø> (ø)	⬇️

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