fix: pom.xml to reduce vulnerabilities (#70)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMFASTERXMLJACKSONCORE-3038424
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEPROTOBUF-3040284
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEPROTOBUF-3167772
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEPROTOBUF-3167774
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHECOMMONS-1316638
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHECOMMONS-1316639
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHECOMMONS-1316640
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHECOMMONS-1316641
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHECOMMONS-32473
- https://snyk.io/vuln/SNYK-JAVA-ORGJSON-5488379

pom.xml

@@ -27,7 +27,7 @@
   <packaging>jar</packaging>
 
   <properties>
-    <beam.version>2.42.0</beam.version>
+    <beam.version>2.47.0</beam.version>
 
     <bigquery.version>v2-rev459-1.25.0</bigquery.version>
     <google-api-client.version>1.35.2</google-api-client.version>