Update latest version references to 1.2.0-rc4.

PiperOrigin-RevId: 206863029
GitOrigin-RevId: bd228ae7e22e4f32ec2ffa63b872ffb020cb046a

Author: chuckx

README.md

@@ -84,13 +84,13 @@ AEAD primitive in Java:
 
 *   [Tink for Java and Android](docs/JAVA-HOWTO.md) are field tested and ready
     for production. The latest version is
-    [1.2.0-rc3](https://github.com/google/tink/releases/tag/v1.2.0-rc3),
-    released on 2018-07-27.
+    [1.2.0-rc4](https://github.com/google/tink/releases/tag/v1.2.0-rc4),
+    released on 2018-07-31.
 
 *   [Tink for C++](docs/CPP-HOWTO.md) and [Tink for Obj-C](docs/OBJC-HOWTO.md)
     are almost ready for production. The latest version is
-    [1.2.0-rc2](https://github.com/google/tink/releases/tag/v1.2.0-rc2),
-    released on 2018-07-13.
+    [1.2.0-rc4](https://github.com/google/tink/releases/tag/v1.2.0-rc4),
+    released on 2018-07-31.
 
 *   Tink for Go and Javascript are in active development.
 

apps/paymentmethodtoken/README.md

@@ -3,9 +3,9 @@
 ## Latest release
 
 The most recent release is
-[1.2.0-rc3](https://github.com/google/tink/releases/tag/v1.2.0-rc3), released
-2018-07-27. API docs can be found
-[here](https://google.github.com/tink/javadoc/apps-paymentmethodtoken/1.2.0-rc3).
+[1.2.0-rc4](https://github.com/google/tink/releases/tag/v1.2.0-rc4), released
+2018-07-31. API docs can be found
+[here](https://google.github.com/tink/javadoc/apps-paymentmethodtoken/1.2.0-rc4).
 
 The Maven group ID is `com.google.crypto.tink`, and the artifact ID is
 `apps-paymentmethodtoken`.
@@ -16,7 +16,7 @@ To add a dependency using Maven:
 <dependency>
   <groupId>com.google.crypto.tink</groupId>
   <artifactId>apps-paymentmethodtoken</artifactId>
-  <version>1.2.0-rc3</version>
+  <version>1.2.0-rc4</version>
 </dependency>
 ```
 

apps/webpush/README.md

@@ -11,15 +11,15 @@ To add a dependency using Maven:
 <dependency>
   <groupId>com.google.crypto.tink</groupId>
   <artifactId>apps-webpush</artifactId>
-  <version>1.2.0-rc3</version>
+  <version>1.2.0-rc4</version>
 </dependency>
 ```
 
 To add a dependency using Gradle:
 
 ```
 dependencies {
-  compile 'com.google.crypto.tink:apps-webpush:1.2.0-rc3'
+  compile 'com.google.crypto.tink:apps-webpush:1.2.0-rc4'
 }
 ```
 

docs/JAVA-HOWTO.md

@@ -16,24 +16,24 @@ Tink can be installed with Maven or Gradle. The Maven group ID is
 `com.google.crypto.tink`, and the artifact ID is `tink`.
 
 The most recent release is
-[1.2.0-rc3](https://github.com/google/tink/releases/tag/v1.2.0-rc3), released
-2018-07-27.
+[1.2.0-rc4](https://github.com/google/tink/releases/tag/v1.2.0-rc4), released
+2018-07-31.
 
 Java developers can add Tink using Maven:
 
 ```xml
 <dependency>
   <groupId>com.google.crypto.tink</groupId>
   <artifactId>tink</artifactId>
-  <version>1.2.0-rc3</version>
+  <version>1.2.0-rc4</version>
 </dependency>
 ```
 
 Android developers can add Tink using Gradle:
 
 ```
 dependencies {
-  compile 'com.google.crypto.tink:tink-android:1.2.0-rc3'
+  compile 'com.google.crypto.tink:tink-android:1.2.0-rc4'
 }
 ```
 
@@ -82,10 +82,10 @@ dependencies {
 ## API docs
 
 *   Java:
-    *   [1.2.0-rc3](https://google.github.com/tink/javadoc/tink/1.2.0-rc3)
+    *   [1.2.0-rc4](https://google.github.com/tink/javadoc/tink/1.2.0-rc4)
     *   [HEAD-SNAPSHOT](https://google.github.com/tink/javadoc/tink/HEAD-SNAPSHOT)
 *   Android:
-    *   [1.2.0-rc3](https://google.github.com/tink/javadoc/tink-android/1.2.0-rc3)
+    *   [1.2.0-rc4](https://google.github.com/tink/javadoc/tink-android/1.2.0-rc4)
     *   [HEAD-SNAPSHOT](https://google.github.com/tink/javadoc/tink-android/HEAD-SNAPSHOT)
 
 ## Important Warnings