Bumped version to 0.6.1

Update the README

Author: dreampiggy

README.md

@@ -178,6 +178,7 @@ NSData *webpData = [[SDImageWebPCoder sharedCoder] encodedDataWithImage:image fo
 // Encode Quality
 NSData *lossyWebpData = [[SDImageWebPCoder sharedCoder] encodedDataWithImage:image format:SDImageFormatWebP options:@{SDImageCoderEncodeCompressionQuality : @(0.1)}]; // [0, 1] compression quality
 NSData *limitedWebpData = [[SDImageWebPCoder sharedCoder] encodedDataWithImage:image format:SDImageFormatWebP options:@{SDImageCoderEncodeMaxFileSize : @(1024 * 10)}]; // v0.6.0 feature, limit output file size <= 10KB
+NSData *thumbnailWebpData = [[SDImageWebPCoder sharedCoder] encodedDataWithImage:image format:SDImageFormatWebP options:@{SDImageCoderEncodeMaxPixelSize : @(CGSizeMake(200, 200)}]; // v0.6.1 feature, encoding max pixel size
 ```
 
 + Swift
@@ -188,6 +189,7 @@ let image: UIImage
 let webpData = SDImageWebPCoder.shared.encodedData(with: image, format: .webP, options: nil)
 let lossyWebpData = SDImageWebPCoder.shared.encodedData(with: image, format: .webP, options: [.encodeCompressionQuality: 0.1]) // [0, 1] compression quality
 let limitedWebpData = SDImageWebPCoder.shared.encodedData(with: image, format: .webP, options: [.encodeMaxFileSize: 1024 * 10]) // v0.6.0 feature, limit output file size <= 10KB
+let thumbnailWebpData = SDImageWebPCoder.shared.encodedData(with: image, format: .webP, options: [.encodeMaxPixelSize: CGSize(width: 200, height: 200)]) // v0.6.1 feature, encoding max pixel size
 ```
 
 See more documentation in [SDWebImage Wiki - Coders](https://github.com/SDWebImage/SDWebImage/wiki/Advanced-Usage#custom-coder-420)

SDWebImageWebPCoder.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'SDWebImageWebPCoder'
-  s.version          = '0.6.0'
+  s.version          = '0.6.1'
   s.summary          = 'WebP decoder/encoder for SDWebImage coder plugin.'
 
   s.description      = <<-DESC

SDWebImageWebPCoder/Module/Info.plist

@@ -15,9 +15,9 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.6.0</string>
+	<string>0.6.1</string>
 	<key>CFBundleVersion</key>
-	<string>0.6.0</string>
+	<string>0.6.1</string>
 	<key>NSPrincipalClass</key>
 	<string></string>
 </dict>