Detect I2C devices

Revision:
2:85afa5129e56
Parent:
0:81685bb49271
--- a/mbed-os.lib	Mon Apr 23 09:31:48 2018 +0000
+++ b/mbed-os.lib	Fri Dec 04 11:02:11 2020 +0900
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360
+https://github.com/ARMmbed/mbed-os/#f2278567d09b9ae9f4843e1d9d393526b9462783
\ No newline at end of file