• Performance improvements for motion value updates.

Execution times for value updates have been significantly reduced for all value types. Some examples (tests run on Release configuration): | Value type | Speed increase | | ---------- | ------------ | | Double | 17% | | UIColor | 74% | | CGPoint | 62% | | CGRect | 65% | | SIMD64 | 188% |

For instance, all 64 values of a SIMD64<Double> object in a Motion operation can now be updated on the target object in 52 microseconds (0.0000522 seconds), all properties of a CGRect can be updated in 6 microseconds, and a single Double value of an object property can now be updated in 1.2 microseconds.

• Fixed CIColorAssistant not respecting the existing colorspace of the original object during animations.
• Added performance tests.
• ValueAssistant's updateProperty(property:, newValue:) method was changed to update(properties:, targetObject:) to support updating multiple properties at once.