Update hecs requirement from 0.3.0 to 0.6.0

[dependabot-preview]

Updates the requirements on hecs to permit the latest version.

Changelog

Sourced from hecs's changelog.

Unreleased

Changed

• World::iter no longer returns entity IDs directly; they can now instead be fetched from the EntityRef
• World::spawn_batch and World::reserve now employ Vec-style amortized resizing, improving performance when called repeatedly.

Added

• EntityRef::query as an alternative to World::query_one when you already have an EntityRef
• EntityRef::entity accessor for recovering the entity's handle
• PreparedQuery for improved performance when repeatedly issuing the same query

0.5.2

Fixed

• World::query_mut did not prevent aliasing mutable borrows within the query

0.5.1

Changed

• Documentation updates only

0.5.0

Changed

• Improved performance for spawning, inserting, or removing statically-typed component bundles

Fixed

• World::archetypes_generation not updated when a column batch spawn introduces a new archetype

0.4.0

Changed

• Row-major serialization moved under serialize::row and behind the row-serialize cargo feature

Added

• EntityRef::len to query how many components an entity has
• Support for serializers that require maps to be of known length
• An alternative column-major serialization layout for better performance and compressibility, in the serialize::column module behind the column-serialize feature

Fixed

• Incorrect behavior when building a ColumnBatch of zero entities

0.3.2

Added

• The serde feature, enabling serialization of Entity handles, and a serialization module to simplify (de)serializing worlds

... (truncated)

Commits

• 4bc42e7 Bump versions
• 3629cb2 Note resize optimization in changelog
• be63336 Tweak metadata
• a8545a2 Apply exponential resize strategy to reserve
• b158378 Emphasize dynamic/static type differences in spawn APIs
• 4088845 Add PreparedQuery to changelog
• aa128cc Remove meaningless UnsafeCell
• 9032f86 Avoid having to initialise a prepared query using a reference to a world.
• 2b13b19 Fill in the missing docstrings now that the internal API has settled a bit.
• 15ef81f Expand the prepared query benchmarks to cover all combinations of prepared an...
• Additional commits viewable in compare view

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