net/savvycan: Update to 1.0.187

Changes since 1.173:

• GraphWindow: support rescaling the view or each axis to the data
• Bug fixes for extended IDs in DBC files, fix one off error in a few places (Corrects fuzzing window ID range), re-enabled overwrite mode showing all signals in a message
• Fixes to make graphing of multiplexed signals work properly Added signal comparison to the file comparison window.
• Add support for PCAN ver 1.3 files