Fix travis failures
Fix travis failures

Pin the cmsis-svd version to >=0.4 since version 0.2 and 0.3 cause
installation problems in some configurations.

mbedmicro/pyOCD,pyocd/pyOCD,pyocd/pyOCD,0xc0170/pyOCD,wjzhang/pyOCD,mesheven/pyOCD,0xc0170/pyOCD,flit/pyOCD,matthewelse/pyOCD,matthewelse/pyOCD,mbedmicro/pyOCD,mesheven/pyOCD,wjzhang/pyOCD,flit/pyOCD,matthewelse/pyOCD,mbedmicro/pyOCD,wjzhang/pyOCD,0xc0170/pyOCD,mesheven/pyOCD