Support for align-content: space-evenly

Author: OhKanghoon

README.md

@@ -580,7 +580,7 @@ Reminder: the cross axis is the axis perpendicular to the main axis. Its directi
 
 ### alignContent()
 - Applies to: `flex containers`
-- Values: `start` / `end` / `center` / `stretch` / `spaceBetween` / `spaceAround`
+- Values: `start` / `end` / `center` / `stretch` / `spaceBetween` / `spaceAround` / `spaceEvenly`
 - Default value: `start`
 - CSS name: `align-content`  
 
@@ -600,6 +600,7 @@ Note, `alignContent` has no effect when the flexbox has only a single line.
 | **stretch**	| <img src="docs_markdown/images/flexlayout-alignItems-column-stretch.png" width="140"/>| <img src="docs_markdown/images/flexlayout-alignItems-row-stretch.png" width="160"/>|
 | **spaceBetween** | <img src="docs_markdown/images/flexlayout-alignItems-column-spaceBetween.png" width="160"/> | <img src="docs_markdown/images/flexlayout-alignItems-row-spaceBetween.png" width="160"/>|
 | **spaceAround** | <img src="docs_markdown/images/flexlayout-alignItems-column-spaceAround.png" width="160"/> | <img src="docs_markdown/images/flexlayout-alignItems-row-spaceAround.png" width="160"/>|
+| **spaceEvenly** | | |
 
 <br/>
 

Sources/Swift/FlexLayout.swift

@@ -1382,6 +1382,9 @@ public final class Flex {
         case spaceBetween
         /// Lines are evenly distributed in the flex container, with half-size spaces on either end	Play it »
         case spaceAround
+        /// Lines are evenly distributed in the flex container
+        /// The size of gaps between children and between the parent's edges and the first/last child will all be equal
+        case spaceEvenly
     }
 
     /**

Sources/Swift/Impl/FlexLayout+Enum.swift

@@ -42,6 +42,7 @@ extension YGAlign {
     static let flexEnd = YGAlignFlexEnd
     static let spaceBetween = YGAlignSpaceBetween
     static let spaceAround = YGAlignSpaceAround
+    static let spaceEvenly = YGAlignSpaceEvenly
 }
 
 extension YGWrap {
@@ -106,6 +107,7 @@ extension Flex.AlignContent {
         case .end:          return YGAlign.flexEnd
         case .spaceBetween: return YGAlign.spaceBetween
         case .spaceAround:  return YGAlign.spaceAround
+        case .spaceEvenly:  return YGAlign.spaceEvenly
         }
     }
 }