Swift 4.2

Update Swift version to 4.2

Disable SWIFT_SWIFT3_OBJC_INFERENCE

2.1.2

Disable SWIFT_SWIFT3_OBJC_INFERENCE to remove warnings

Return whether the count changed

Merge pull request #6 from daehn/feature/return-if-count-changed

Return whether or not the count changed

Set count enhancements

Merge pull request #5 from daehn/fix/add-when-non-existent

Add non-existent elements when calling setCount(_, for:)

Swift 4

2.0.0

Update to Swift 4

Use `Int` as count return type

Merge pull request #3 from daehn/feature/set-count-directly

Convert to use Int as count type, make count return non-optional

Fix hash collisions

Merge pull request #2 from daehn/fix/hash-collisions

Fix hash collisions

Initial Release

Merge branch 'develop'

# Conflicts:
#	README.md