Bump twig/twig from 1.29.0 to 2.12.5 in /src/frontend

[dependabot[bot]]

Bumps twig/twig from 1.29.0 to 2.12.5.

Changelog

Sourced from twig/twig's changelog.

• 2.12.5 (2020-02-11)

• Add a check to ensure that iconv() is defined

• 2.12.4 (2020-02-11)

• Avoid exceptions when an intl resource is not found

• Fix implementation of case-insensitivity for method names

• 2.12.3 (2019-12-28)

• fixed Symfony 5.0 support for the HTML extra extension

• fixed number formatter in Intl extra extension when using a formatter prototype

• 2.12.2 (2019-11-11)

• added supported for exponential numbers

• 2.12.1 (2019-10-17)

• added the String extension in the "extra" repositories: "u" filter

• 2.12.0 (2019-10-05)

• added the spaceship operator (""), useful when using an arrow function in the "sort" filter

• added support for an "arrow" function on the "sort" filter

• added the CssInliner extension in the "extra" repositories: "inline_css" filter

• added the Inky extension in the "extra" repositories: "inky_to_html" filter

• added Intl extension in the "extra" repositories: "country_name", "currency_name", "currency_symbol", "language_name", "locale_name", "timezone_name", "format_currency", "format_number", "format_*_number", "format_datetime", "format_date", and "format_time" filters, and the "country_timezones" function

• added the Markdown extension in the "extra" repositories: "markdown_to_html", and "html_to_markdown" filters

• added the HtmlExtension extension in the "extra" repositories: "date_uri" filter, and "html_classes" function

• optimized "block('foo') ?? 'bar'"

• fixed the empty test on Traversable instances

• fixed array_key_exists() on objects

• fixed cache when opcache is installed but disabled

• fixed using macros in arrow functions

• fixed split filter on edge case

• 2.11.3 (2019-06-18)

• display partial output (PHP buffer) when an error occurs in debug mode

• fixed the filter filter (allow the result to be used several times)

• fixed macro auto-import when a template contains only macros

... (truncated)

Commits

• 18772e0 Prepare the 2.12.5 release
• 1202869 allow null string in StringExtension
• f0ccbfc bug #3262 Add a check to ensure that iconv() is defined (fabpot)
• 158a853 Add a check to ensure that iconv() is defined
• d8a22bd Merge branch '1.x' into 2.x
• c984687 Fix 7.4 on Travis
• 71ddecc Fix version
• a460efc Bump version to 2.12.5-DEV
• 822d57e Prepare the 2.12.4 release
• 982f8bd Bump version to 1.42.6-DEV
• Additional commits viewable in compare view

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