Bump scala-library from 2.12.4 to 2.13.0

[dependabot-preview]

Bumps scala-library from 2.12.4 to 2.13.0.

Release notes

Sourced from scala-library's releases.

Scala 2.13.0

DRAFT RELEASE NOTES STILL ACTIVELY BEING REVISED

We are delighted to announce the availability of Scala 2.13.0!

Collections redesign

Standard library collections have been overhauled.

This is the centerpiece of the release.

Most ordinary code that used the old collections will continue to work as-is, except as detailed below.

The most important collections changes are:

• Simpler method signatures
  • No more CanBuildFrom. Transformation methods no longer take an implicit CanBuildFrom parameter.
  • The resulting library is easier to understand (in code, Scaladoc, and IDE code completion).
  • It also makes user code compile faster.
  • A new BuildFrom implicit is used in a handful of places that need it.
• Simpler type hierarchy
  • No more Traversable and TraversableOnce
    • They remain only as deprecated aliases for Iterable and IterableOnce
  • Parallel collections are now a separate module
  • No more GenSeq, GenTraversableOnce, et al.
• Immutable scala.Seq
  • Seq is now an alias for scala.collection.immutable.Seq
  • Before, it was an alias for the possibly-mutable scala.collection.Seq.
  • This also changes the type of varargs in methods and pattern matches.
  • Arrays passed as varargs are defensively copied. (#6970)
• Simplified views that work
  • scala.collection.Views have been vastly simplified and should now work reliably.
• New, faster HashMap/Set implementations
  • Both immutable (d5ae93e) and mutable (#7348) versions were completely replaced.
  • They substantially outperform the old implementations in most scenarios.
  • The mutable versions now perform on par with the Java standard library's implementations.
• New concrete collections
  • immutable.LazyListreplaces immutable.Stream. Stream had different laziness behavior and is now deprecated. (#7558, #7000)
  • immutable.ArraySeq is an immutable wrapper for an array.
  • mutable.CollisionProofHashMap guards against denial-of-service attacks (#7633)
  • mutable.ArrayDeque is a double-ended queue that internally uses a resizable circular buffer (scala/collection-strawman#490)
• New abstract collection type SeqMap
  • immutable.SeqMap provides immutable maps that maintain insertion order. (#7954)
  • Implementations: VectorMap (#6854) and TreeSeqMap (#7146) (in addition to the already existing ListMap).

Additional collections changes:

• New to(Collection) method
  • Replaces old to[Collection] method.

... (truncated)

Commits

• 43e040f Merge pull request #8113 from szeiger/wip/stringops-collect
• 6961265 Merge pull request #8118 from magnolia-k/add_doc_ArraySeq#unsafeWrapArray
• b5927fb Merge pull request #8058 from dwijnand/spec-dont-recur-on-eta-expansion
• f6cc304 Add StringOps#collect methods
• 6f02f40 Merge pull request #8117 from xuwei-k/fix-11551
• 6a5db80 Added to the document about why it is 'unsafe'.
• 5ea2460 fix 11551. use == instead of equals in BitmapIndexedSetNode
• 3274eff Merge pull request #8115 from SethTisue/rc3-is-starr
• fb46b4e re-STARR and reset MiMa onto RC3
• a73bacc fixup mima
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #61.