AssertThat 0.4.0

• Added Swift documentation for assertThat and Assertion
• Removed redundant contains and doesNotContain from StringProtocol (these are already implemented for Sequence)
• Removed redundant isEmpty and isNotEmpty from StringProtocol (these are already implemented for Collection)
• Changed closure and error assertions to utilize XCTAssertThrowsError and XCTAssertNoThrow
• Moved isZero and isNotZero from Numeric to the more generic AdditiveArithmetic
• Moved startsWith, doesNotStartWith, endsWith, and doesNotEndWith from StringProtocol to the more generic Sequence

AssertThat 0.3.0

• Removed explicit test discovery on Linux
• Added isOne and isNotOne for Numeric
• Added contains and doesNotContain for Sequence
• Added assertions for Collection
• Various internal code improvements

AssertThat 0.2.0

• The library now uses test discovery on Linux to simplify tests
• Simplified Assertion to have only a single stored property: subject

AssertThat 0.1.0

• Initial release