Bump opennlp-tools from 1.9.3 to 1.9.4

Bumps [opennlp-tools](https://github.com/apache/opennlp) from 1.9.3 to 1.9.4.
- [Release notes](https://github.com/apache/opennlp/releases)
- [Commits](https://github.com/apache/opennlp/compare/opennlp-1.9.3...opennlp-1.9.4)

---
updated-dependencies:
- dependency-name: org.apache.opennlp:opennlp-tools
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Closes #36

Change-Id: I66a73192bf9ac1e86c3638ccf0ce1921d7c800b0
diff --git a/pom.xml b/pom.xml
index c1a2aa8..284190a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -258,7 +258,7 @@
         <dependency>
             <groupId>org.apache.opennlp</groupId>
             <artifactId>opennlp-tools</artifactId>
-            <version>1.9.3</version>
+            <version>1.9.4</version>
         </dependency>
         <dependency>
             <groupId>org.apache.maven.surefire</groupId>