[GraphQL] Use GraphQL::Types::BigInt instead of Int

app/graphql/schema.graphql

@@ -18,6 +18,12 @@ type Avis {
   reponse: String
 }
 
+"""
+Represents non-fractional signed whole numeric values. Since the value may
+exceed the size of a 32-bit integer, it's encoded as a string.
+"""
+scalar BigInt
+
 type CarteChamp implements Champ {
   geoAreas: [GeoArea!]!
   id: ID!
@@ -648,7 +654,7 @@ enum DossierState {
 }
 
 type Entreprise {
-  capitalSocial: Int!
+  capitalSocial: BigInt!
   codeEffectifEntreprise: String!
   dateCreation: ISO8601Date!
   formeJuridique: String!
@@ -730,7 +736,7 @@ type IntegerNumberChamp implements Champ {
   La valeur du champ sous forme texte.
   """
   stringValue: String
-  value: Int
+  value: BigInt
 }
 
 type LinkedDropDownListChamp implements Champ {

app/graphql/types/champs/integer_number_champ_type.rb

@@ -2,7 +2,7 @@ module Types::Champs
   class IntegerNumberChampType < Types::BaseObject
     implements Types::ChampType
 
-    field :value, Int, null: true
+    field :value, GraphQL::Types::BigInt, null: true
 
     def value
       if object.value.present?

app/graphql/types/personne_morale_type.rb

@@ -2,7 +2,7 @@ module Types
   class PersonneMoraleType < Types::BaseObject
     class EntrepriseType < Types::BaseObject
       field :siren, String, null: false
-      field :capital_social, Int, null: false
+      field :capital_social, GraphQL::Types::BigInt, null: false
       field :numero_tva_intracommunautaire, String, null: false
       field :forme_juridique, String, null: false
       field :forme_juridique_code, String, null: false

spec/controllers/api/v2/graphql_controller_spec.rb

@@ -308,6 +308,7 @@ describe API::V2::GraphqlController do
                   entreprise {
                     siren
                     dateCreation
+                    capitalSocial
                   }
                 }
               }
@@ -330,7 +331,8 @@ describe API::V2::GraphqlController do
               siegeSocial: dossier.etablissement.siege_social,
               entreprise: {
                 siren: dossier.etablissement.entreprise_siren,
-                dateCreation: dossier.etablissement.entreprise_date_creation.iso8601
+                dateCreation: dossier.etablissement.entreprise_date_creation.iso8601,
+                capitalSocial: dossier.etablissement.entreprise_capital_social.to_s
               }
             }
           })