Fix add missing state in nigeria (#195)

* 🎨 (countriesAndState.js) add Mureș County to Romania

* 💥 (countriesAndState.js) added missing Rivers State

added missing rivers state in Nigeria, and changed `state_code` to use
`NG-` prefix.

Closes #175

model/countriesAndState.js

@@ -16202,182 +16202,187 @@ const CountriesState = [
       {
         id: 303,
         name: 'Abia State',
-        state_code: 'AB',
+        state_code: 'NG-AB',
       },
       {
         id: 320,
         name: 'Adamawa State',
-        state_code: 'AD',
+        state_code: 'NG-AD',
       },
       {
         id: 304,
         name: 'Akwa Ibom State',
-        state_code: 'AK',
+        state_code: 'NG-AK',
       },
       {
         id: 315,
         name: 'Anambra State',
-        state_code: 'AN',
+        state_code: 'NG-AN',
       },
       {
         id: 312,
         name: 'Bauchi State',
-        state_code: 'BA',
+        state_code: 'NG-BA',
       },
       {
         id: 305,
         name: 'Bayelsa State',
-        state_code: 'BY',
+        state_code: 'NG-BY',
       },
       {
         id: 291,
         name: 'Benue State',
-        state_code: 'BE',
+        state_code: 'NG-BE',
       },
       {
         id: 307,
         name: 'Borno State',
-        state_code: 'BO',
+        state_code: 'NG-BO',
       },
       {
         id: 314,
         name: 'Cross River State',
-        state_code: 'CR',
+        state_code: 'NG-CR',
       },
       {
         id: 316,
         name: 'Delta State',
-        state_code: 'DE',
+        state_code: 'NG-DE',
       },
       {
         id: 311,
         name: 'Ebonyi State',
-        state_code: 'EB',
+        state_code: 'NG-EB',
       },
       {
         id: 318,
         name: 'Edo State',
-        state_code: 'ED',
+        state_code: 'NG-ED',
       },
       {
         id: 309,
         name: 'Ekiti State',
-        state_code: 'EK',
+        state_code: 'NG-EK',
       },
       {
         id: 289,
         name: 'Enugu State',
-        state_code: 'EN',
+        state_code: 'NG-EN',
       },
       {
         id: 293,
         name: 'Federal Capital Territory',
-        state_code: 'FC',
+        state_code: 'NG-FC',
       },
       {
         id: 310,
         name: 'Gombe State',
-        state_code: 'GO',
+        state_code: 'NG-GO',
       },
       {
         id: 308,
         name: 'Imo State',
-        state_code: 'IM',
+        state_code: 'NG-IM',
       },
       {
         id: 288,
         name: 'Jigawa State',
-        state_code: 'JI',
+        state_code: 'NG-JI',
       },
       {
         id: 294,
         name: 'Kaduna State',
-        state_code: 'KD',
+        state_code: 'NG-KD',
       },
       {
         id: 300,
         name: 'Kano State',
-        state_code: 'KN',
+        state_code: 'NG-KN',
       },
       {
         id: 313,
         name: 'Katsina State',
-        state_code: 'KT',
+        state_code: 'NG-KT',
       },
       {
         id: 290,
         name: 'Kebbi State',
-        state_code: 'KE',
+        state_code: 'NG-KE',
       },
       {
         id: 298,
         name: 'Kogi State',
-        state_code: 'KO',
+        state_code: 'NG-KO',
       },
       {
         id: 295,
         name: 'Kwara State',
-        state_code: 'KW',
+        state_code: 'NG-KW',
       },
       {
         id: 306,
         name: 'Lagos State',
-        state_code: 'LA',
+        state_code: 'NG-LA',
       },
       {
         id: 301,
         name: 'Nasarawa State',
-        state_code: 'NA',
+        state_code: 'NG-NA',
       },
       {
         id: 317,
         name: 'Niger State',
-        state_code: 'NI',
+        state_code: 'NG-NI',
       },
       {
         id: 323,
         name: 'Ogun State',
-        state_code: 'OG',
+        state_code: 'NG-OG',
       },
       {
         id: 321,
         name: 'Ondo State',
-        state_code: 'ON',
+        state_code: 'NG-ON',
       },
       {
         id: 322,
         name: 'Osun State',
-        state_code: 'OS',
+        state_code: 'NG-OS',
       },
       {
         id: 296,
         name: 'Oyo State',
-        state_code: 'OY',
+        state_code: 'NG-OY',
       },
       {
         id: 302,
         name: 'Plateau State',
-        state_code: 'PL',
+        state_code: 'NG-PL',
+      },
+      {
+        id: 302,
+        name: 'Rivers State',
+        state_code: 'NG-RI',
       },
       {
         id: 292,
         name: 'Sokoto State',
-        state_code: 'SO',
+        state_code: 'NG-SO',
       },
       {
         id: 319,
         name: 'Taraba State',
-        state_code: 'TA',
+        state_code: 'NG-TA',
       },
       {
         id: 297,
         name: 'Yobe State',
-        state_code: 'YO',
+        state_code: 'NG-YO',
       },
       {
         id: 299,
         name: 'Zamfara State',
-        state_code: 'ZA',
+        state_code: 'NG-ZA',
       },
     ],
   },