Bump org.apache.opennlp:opennlp-tools from 2.5.7 to 2.5.8

Bumps [org.apache.opennlp:opennlp-tools](https://github.com/apache/opennlp) from 2.5.7 to 2.5.8.
- [Release notes](https://github.com/apache/opennlp/releases)
- [Commits](https://github.com/apache/opennlp/compare/opennlp-2.5.7...opennlp-2.5.8)

---
updated-dependencies:
- dependency-name: org.apache.opennlp:opennlp-tools
  dependency-version: 2.5.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Closes #40

Change-Id: I92050a495a25385c62d0c02d98de86461254d8cd
diff --git a/app/build.gradle b/app/build.gradle
index 1b4c920..ca26492 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -45,7 +45,7 @@
 
     implementation 'com.github.kupietz:cistern:v1.0.4'
     implementation 'org.maltparser:maltparser:1.9.2'
-    implementation 'org.apache.opennlp:opennlp-tools:2.5.7'
+    implementation 'org.apache.opennlp:opennlp-tools:2.5.8'
     implementation('edu.stanford.nlp:stanford-corenlp') {
         version {
             strictly '[3.0.0, 4.0.0)'