This is the release: mbed-os-5.15.6

This is the release: mbed-os-6.4.0

This is the release: mbed-os-6.3.0

This is the release: mbed-os-6.2.1

This is the release: mbed-os-5.15.5

This is the release: mbed-os-6.2.0

Updated to mbed-os-6.1.0

mbed-os-6.0.0 release

Tagging Mbed OS version 5.12.1

Merge pull request ARMmbed#131 from ARMmbed/release-candidate

Updating mbed-os to mbed-os-5.12.0-rc4