camelCase argument in command requires inferred alias

[vasco-santos]

After yargs/yargs-parser/commit/08c011796f83e84fe50ffb066a87ae2effadfc75 got merged, commands using camelCase parameters were automatically inferred to have a dash case alias.

When we use this feature combined with using ... to optionally accept a list, throws an error Unknow argument, for instance in ipfs/js-ipfs/src/cli/commands/pin/ls.js#L7

In order to fix this, we have to set a dash-case option. This seems a bug with yargs-parser, as if it inferres other alias, it should be transparent to the users.