added `updateLegal`

last method missing for legal users

https://docs.mangopay.com/api-references/users/legal-users/
Merge pull request #27 from PedroEsperanca/patch-5

added `updateLegal`
add url params in $query
Merge branch 'master' of github.com:larafale/mangopay
0.0.8
Added pagination filter and sorting
Merge pull request #29 from fix/patch-1

Added pagination filter and sorting
Added fetchTransfer method to wallet resource