eRPC updates 07/2021

-- Fix the order of commands in underlyingReceive and underlyingSend of UART CMSIS transport.
-- Fix (revert) the sequence of commands in MUTransport::rx_cb (bug unintentionally introduced by Github pull request EmbeddedRPC#158).
-- Identify the used LINK hw during the runtime (LPCLINK2 vs. MCULINK) in transport.py.
-- Improve I2cSlaveTransport
-- Add reference links into erpc/README.md.
-- Update license file.

eRPC updates 07/2020

-- Unit test code updated to handle service add and remove operations
-- Several MISRA issues in rpmsg-based transports addressed
-- Support MU transport unit testing
-- Fixed Linux/TCP acceptance tests in release target
-- Minor documentation updates, code formatting

eRPC updates 12/2019

-- improved the test_callbacks logic to be more understandable and to allow requested callback execution on the server side
-- transportArbitrator::prepareClientReceive modified to avoid incorrect return value type
-- the ClientManager and the ArbitratedClientManager updated to avoid performing client requests when the previous serialization phase fails
-- generate the shim code for destroy of statically allocated services
-- documentation update for v1.7.3

eRPC v1.7.0