update README, version bumps

README.md

@@ -18,16 +18,16 @@ Jitpack recommends it be placed at the end of the repositories scope.
 `maven { url 'https://jitpack.io' }`
 
 Then add the following to your dependencies:
-`implementation 'com.github.nathancheshire:gravatarjavaclient:2.0.3'`.
+`implementation 'com.github.nathancheshire:gravatarjavaclient:2.0.4'`.
 
 # Jitpack
 
 These links are mostly for me but if you would like to view the official Jitpack build log or artifacts list, these
 are the following links:
 
-Artifacts: https://jitpack.io/com/github/nathancheshire/gravatarjavaclient/2.0.3/
+Artifacts: https://jitpack.io/com/github/nathancheshire/gravatarjavaclient/2.0.4/
 
-Build log: https://jitpack.io/com/github/nathancheshire/gravatarjavaclient/2.0.3/build.log
+Build log: https://jitpack.io/com/github/nathancheshire/gravatarjavaclient/2.0.4/build.log
 
 ## API Support
 
@@ -75,6 +75,22 @@ GravatarProfile profileWithAuthenticatedFields = GravatarProfileRequest.fromEmai
         .getProfile();
 ```
 
+For generating QR codes:
+
+```java
+// Create the request
+GravatarQrCodeRequest request = GravatarQrCodeRequest.fromEmail("[email protected]")
+        .setSize(800)
+        .setImageType(GravatarQrImageType.USER)
+        .setVersion(GravatarQrImageVersion.THREE);
+
+// Get a BufferedImage
+BufferedImage image = request.getBufferedImage();
+
+// Save to a local file (API returns a PNG image)
+boolean wasSaved = request.saveTo(new File("path/to/your/file.png"));
+```
+
 Because `GravatarProfileRequest` accepts a `GravatarProfileTokenProvider` instead of a literal string, you as the
 developer have the ability to prevent token strings from appearing in the string pool if you deem it to be worth
 the effort. Instead of simply returning a string from the provider, the provider returns a byte array which allows

build.gradle

@@ -10,7 +10,7 @@ java {
 }
 
 group 'com.github.natche.gravatarjavaclient'
-version '2.0.3'
+version '2.0.4'
 
 repositories {
     mavenCentral()

src/main/java/com/github/natche/gravatarjavaclient/utils/Hasher.java

@@ -37,7 +37,7 @@ private Hasher(String algorithm) {
      *
      * @param algorithm the algorithm
      * @return a new Hasher instance using the provided algorithm
-     * @throws NullPointerException if the provided algorithm is null
+     * @throws NullPointerException     if the provided algorithm is null
      * @throws IllegalArgumentException if the provided algorithm is empty
      */
     public static Hasher fromAlgorithm(String algorithm) {