Upgeade dependencies.
diff --git a/pom.xml b/pom.xml
index ef8fb26..e6b7183 100644
--- a/pom.xml
+++ b/pom.xml
@@ -39,7 +39,7 @@
   <parent>
     <groupId>org.apache</groupId>
     <artifactId>apache</artifactId>
-    <version>26</version>
+    <version>27</version>
   </parent>
 
 
@@ -444,7 +444,7 @@
       <dependency>
         <groupId>org.locationtech.jts</groupId>
         <artifactId>jts-core</artifactId>
-        <version>1.18.2</version>
+        <version>1.19.0</version>
         <optional>true</optional>
       </dependency>
       <dependency>
@@ -492,19 +492,19 @@
       <dependency>
         <groupId>org.hsqldb</groupId>
         <artifactId>hsqldb</artifactId>
-        <version>2.6.1</version>
+        <version>2.7.0</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>com.h2database</groupId>
         <artifactId>h2</artifactId>
-        <version>2.1.212</version>
+        <version>2.1.214</version>
         <scope>test</scope>
       </dependency>
       <dependency>
         <groupId>org.postgresql</groupId>
         <artifactId>postgresql</artifactId>
-        <version>42.3.5</version>
+        <version>42.4.1</version>
         <scope>test</scope>
       </dependency>
 
@@ -621,7 +621,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-enforcer-plugin</artifactId>
-        <version>3.0.0</version>
+        <version>3.1.0</version>
         <executions>
           <execution>
             <id>enforce</id>
@@ -683,7 +683,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.0.0-M6</version>
+        <version>3.0.0-M7</version>
         <configuration>
           <trimStackTrace>false</trimStackTrace>
           <includes>
@@ -737,7 +737,7 @@
       <!-- Set "*-source-release.zip" filename prefix to "sis-*" instead of "parent-*" -->
       <plugin>
         <artifactId>maven-assembly-plugin</artifactId>
-        <version>3.3.0</version>
+        <version>3.4.2</version>
         <executions>
           <execution>
             <id>source-release-assembly</id>
@@ -968,7 +968,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-deploy-plugin</artifactId>
-          <version>3.0.0-M2</version>
+          <version>3.0.0</version>
         </plugin>
       </plugins>
     </pluginManagement>