Bump commons-dbcp2 from 2.8.0 to 2.9.0 in /core

Bumps commons-dbcp2 from 2.8.0 to 2.9.0.

Change-Id: Idba8f71e561f99d493947a62f706f0b0866286b5

---
updated-dependencies:
- dependency-name: org.apache.commons:commons-dbcp2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Closes #231

Change-Id: I42278e3f69fb2e8b2007032623c093805567bf70
diff --git a/core/pom.xml b/core/pom.xml
index cdc0196..ac72cf4 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -289,7 +289,7 @@
 		<dependency>
 			<groupId>org.apache.commons</groupId>
 			<artifactId>commons-dbcp2</artifactId>
-			<version>2.8.0</version>
+			<version>2.9.0</version>
 		</dependency>
 
 		<dependency>