Pin yargs to 10.0.2
Pin yargs to 10.0.2

Argument handling is broken with yargs 10.0.3 and later due to
yargs/yargs#1041.  Avoid this by limiting yargs to 10.0.2 until this is
fixed.

Fixes: #32

Signed-off-by: Kevin Locke <ffb4761cba839470133bee36aeb139f58d7dbaa9@kevinlocke.name>

kevinoid/swagger-spec-validator,kevinoid/swagger-spec-validator,kevinoid/swagger-spec-validator