Add missing imports in the test cases

Tests/DynamicColor+HSBTests.swift

@@ -25,6 +25,7 @@
  */
 
 import XCTest
+import DynamicColor
 
 let TestsAcceptedAccuracy = CGFloat(0.000001)
 

Tests/DynamicColor+HSLTests.swift

@@ -25,6 +25,7 @@
  */
 
 import XCTest
+import DynamicColor
 
 class DynamicColorHSLTests: XCTestCase {
   func testInitWithHSLComponents() {

Tests/DynamicColor+RGBATests.swift

@@ -25,6 +25,7 @@
  */
 
 import XCTest
+import DynamicColor
 
 class DynamicColorRGBATests: XCTestCase {
   func testInit() {

Tests/DynamicColor+XYZTests.swift

@@ -25,6 +25,7 @@
  */
 
 import XCTest
+import DynamicColor
 
 class DynamicColorXYZTests: XCTestCase {
   func testInitWithXYZComponents() {

Tests/DynamicColorArrayTests.swift

@@ -25,6 +25,7 @@
  */
 
 import XCTest
+import DynamicColor
 
 class DynamicColorArrayTests: XCTestCase {
   func testGradientProperty() {

Tests/DynamicColorLabTests.swift

@@ -25,6 +25,7 @@
  */
 
 import XCTest
+import DynamicColor
 
 class DynamicColorLabTests: XCTestCase {
   func testInitWithLabComponents() {

Tests/DynamicColorTests.swift

@@ -25,6 +25,7 @@
  */
 
 import XCTest
+import DynamicColor
 
 class DynamicColorTests: XCTestCase {
   func testColorFromHexString() {

Tests/DynamicGradientTests.swift

@@ -25,6 +25,7 @@
  */
 
 import XCTest
+import DynamicColor
 
 class DynamicGradientTests: XCTestCase {
   func testColorPalette() {