Seeed_Arduino_CAN

• Update library.properties and library.json to sync with each other

• Fix compilation warning -Wshift-count-overflow

• Added definitions for mcp2515 to use 12MHz clock
• 12MHz 10KBPS and 5KBPS removed
• Updated libary.json to current version
• Removed special character and updated keywords
• Fix variable collision that broke compatibility with Arudino Uno Wifi
• Merge branch 'Seeed-Studio:master' into master

• Update mcp2518fd_can.cpp
• Removed unused include statement
• Re-include SoftwareSerial in conditional in can-serial.cpp
• Revert library name change

Release v2.2.0