Update to [Truth 1.4.0](https://github.com/google/truth/releases/tag/…

…v1.4.0).

This makes available the rest of the Truth APIs that were recently added in Google's monorepo.

It may be worth also updating to the _following_ version of Truth after it's released, but the purpose of that release will mostly be to deprecate `Truth8`. So, if you just avoid using `Truth8` now (starting by approving any migration CLs that I send your way), then there will be little need for that upgrade. Or, more to the point: I don't expect to keep sending you weekly upgrade CLs after this one :)

PiperOrigin-RevId: 604719853

WORKSPACE

@@ -60,13 +60,13 @@ maven_install(
         maven.artifact(
             "com.google.truth",
             "truth",
-            "1.3.0",
+            "1.4.0",
             testonly = True,
         ),
         maven.artifact(
             "com.google.truth.extensions",
             "truth-java8-extension",
-            "1.3.0",
+            "1.4.0",
             testonly = True,
         ),
         maven.artifact(

pom.xml

@@ -163,13 +163,13 @@ See the Apache License Version 2.0 for the specific language governing permissio
       <dependency>
         <groupId>com.google.truth</groupId>
         <artifactId>truth</artifactId>
-        <version>1.3.0</version>
+        <version>1.4.0</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>com.google.truth.extensions</groupId>
         <artifactId>truth-java8-extension</artifactId>
-        <version>1.3.0</version>
+        <version>1.4.0</version>
         <scope>test</scope>
       </dependency>
       <dependency>