chore: release 2.4.0 (googleapis#576)

🤖 I have created a release \*beep\* \*boop\*
---
## [2.4.0](https://www.github.com/googleapis/java-spanner-jdbc/compare/v2.3.5...v2.4.0) (2021-08-27)


### Features

* support JSON data type ([googleapis#447](https://www.github.com/googleapis/java-spanner-jdbc/issues/447)) ([ca1c906](https://www.github.com/googleapis/java-spanner-jdbc/commit/ca1c906e1ed3cad6444068ab9c8465401d6d3074))


### Dependencies

* update dependency com.google.cloud:google-cloud-spanner-bom to v6.12.1 ([googleapis#577](https://www.github.com/googleapis/java-spanner-jdbc/issues/577)) ([a78b177](https://www.github.com/googleapis/java-spanner-jdbc/commit/a78b177f97c298a5b43fcadbca125e957e9f781a))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+## [2.4.0](https://www.github.com/googleapis/java-spanner-jdbc/compare/v2.3.5...v2.4.0) (2021-08-27)
+
+
+### Features
+
+* support JSON data type ([#447](https://www.github.com/googleapis/java-spanner-jdbc/issues/447)) ([ca1c906](https://www.github.com/googleapis/java-spanner-jdbc/commit/ca1c906e1ed3cad6444068ab9c8465401d6d3074))
+
+
+### Dependencies
+
+* update dependency com.google.cloud:google-cloud-spanner-bom to v6.12.1 ([#577](https://www.github.com/googleapis/java-spanner-jdbc/issues/577)) ([a78b177](https://www.github.com/googleapis/java-spanner-jdbc/commit/a78b177f97c298a5b43fcadbca125e957e9f781a))
+
 ### [2.3.5](https://www.github.com/googleapis/java-spanner-jdbc/compare/v2.3.4...v2.3.5) (2021-08-24)
 
 

pom.xml

@@ -4,7 +4,7 @@
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <artifactId>google-cloud-spanner-jdbc</artifactId>
-  <version>2.3.6-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner-jdbc:current} -->
+  <version>2.4.0</version><!-- {x-version-update:google-cloud-spanner-jdbc:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Spanner JDBC</name>
   <url>https://github.com/googleapis/java-spanner-jdbc</url>

samples/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-spanner-jdbc</artifactId>
-      <version>2.3.6-SNAPSHOT</version>
+      <version>2.4.0</version>
     </dependency>
     <!-- {x-version-update-end} -->
 

versions.txt

@@ -1,4 +1,4 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-spanner-jdbc:2.3.5:2.3.6-SNAPSHOT
+google-cloud-spanner-jdbc:2.4.0:2.4.0