Bump yangtools-artifacts from 2.1.7 to 2.1.8

Bumps yangtools-artifacts from 2.1.7 to 2.1.8.

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

pom.xml

@@ -41,7 +41,7 @@
       <dependency>
         <groupId>org.opendaylight.yangtools</groupId>
         <artifactId>yangtools-artifacts</artifactId>
-        <version>2.1.7</version>
+        <version>2.1.8</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>