CI-friendly pom tweaks (#33)

Author: msbarry

.gitignore

@@ -1,6 +1,7 @@
 .DS_Store
 
 target/
+.flattened-pom.xml
 *.jar
 !.mvn/wrapper/*.jar
 *.log

submodule.pom.xml

@@ -18,7 +18,7 @@
     <dependency>
       <groupId>com.onthegomap.planetiler</groupId>
       <artifactId>planetiler-core</artifactId>
-      <version>${project.parent.version}</version>
+      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>org.yaml</groupId>
@@ -32,7 +32,7 @@
     <dependency>
       <groupId>com.onthegomap.planetiler</groupId>
       <artifactId>planetiler-core</artifactId>
-      <version>${project.parent.version}</version>
+      <version>${project.version}</version>
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>