Prepare 2.0.0 release. (#1819)

Towards #1716.

Signed-off-by: Wolfgang Hess <whess@lyft.com>

Author: wohe

CHANGELOG.rst

@@ -2,8 +2,12 @@
 Changelog for package cartographer
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+2.0.0 (2021-03-09)
+------------------
+https://github.com/cartographer-project/cartographer/compare/1.0.0...2.0.0
+
 1.0.0 (2018-06-01)
-----------------------
+------------------
 https://github.com/googlecartographer/cartographer/compare/0.3.0...1.0.0
 
 0.3.0 (2017-11-23)

package.xml

@@ -17,7 +17,7 @@
 
 <package format="3">
   <name>cartographer</name>
-  <version>1.0.0</version>
+  <version>2.0.0</version>
   <description>
     Cartographer is a system that provides real-time simultaneous localization
     and mapping (SLAM) in 2D and 3D across multiple platforms and sensor