Update Rust crate minijinja to 0.27

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
minijinja	dependencies	minor	0.26 -> 0.27

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Release Notes

mitsuhiko/minijinja

v0.27.0

Compare Source

• Filters, tests and other functions can now be registered with a dynamically
  allocated name. (#​146)
• Added State::current_call which exposes the name of the currently called
  item. (#​150)
• Introduced revamped object model with SeqObject and StructObject. (#​148)
• Object now directly exposes downcast_ref and is.
• Removed Value::as_slice
• Introduced Value::as_seq and Value::as_struct.
• Introduced Value::from_seq_object and Value::from_struct_object.
• Added the ability for function arguments to be of type &dyn SeqObject.
• Renamed Iter to ValueIter.
• Added Environment::render_named_str. (#​149)
• Exposed string interning via the intern function.
• Improved support for structs in built-in filters.
• Added indent filter. (#​151)
• Added the map, select / selectattr and reject / rejectattr filters.
• Added safe / escaped test.
• Strings now have the same iteration behavior as in Jinja2. (#​152)

Breaking Changes

• The Object model changed signficantly in this release. It's now possible
  for objects to have different shapes (structs or sequences today). As a result
  SeqObject and StructObject were added to the API. For changing your objects
  over have a look at the new documentation for Object.
• The Iter type is now called ValueIter.

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