Bump version.

Author: rikba

install/dependencies.rosinstall

@@ -1,3 +1,3 @@
 - git: {local-name: catkin_simple, uri: 'git@github.com:catkin/catkin_simple.git', version: 0e62848b12da76c8cc58a1add42b4f894d1ac21e}
 - git: {local-name: cgal_catkin, uri: 'git@github.com:ethz-asl/cgal_catkin.git', version: releases/CGAL-5.0.3}
-- git: {local-name: polygon_coverage_planning, uri: 'git@github.com:ethz-asl/polygon_coverage_planning.git', version: v2.0.3}
+- git: {local-name: polygon_coverage_planning, uri: 'git@github.com:ethz-asl/polygon_coverage_planning.git', version: v2.0.4}

install/dependencies_https.rosinstall

@@ -1,3 +1,3 @@
 - git: {local-name: catkin_simple, uri: 'https://github.com/catkin/catkin_simple.git', version: 0e62848b12da76c8cc58a1add42b4f894d1ac21e}
 - git: {local-name: cgal_catkin, uri: 'https://github.com/ethz-asl/cgal_catkin.git', version: releases/CGAL-5.0.3}
-- git: {local-name: polygon_coverage_planning, uri: 'https://github.com/ethz-asl/polygon_coverage_planning.git', version: v2.0.3}
+- git: {local-name: polygon_coverage_planning, uri: 'https://github.com/ethz-asl/polygon_coverage_planning.git', version: v2.0.4}