Fixes unshift and insert row not update field's state correctly

src/insert.js

@@ -6,7 +6,7 @@ import { escapeRegexTokens } from './utils'
 const insert: Mutator<any> = (
   [name, index, value]: any[],
   state: MutableState<any>,
-  { changeValue }: Tools<any>
+  { changeValue, resetFieldState }: Tools<any>
 ) => {
   changeValue(state, name, (array: ?(any[])): any[] => {
     const copy = [...(array || [])]
@@ -25,6 +25,10 @@ const insert: Mutator<any> = (
         // Shift all higher indices up
         const incrementedKey = `${name}[${fieldIndex + 1}]${tokens[2]}`
         copyField(state.fields, key, newFields, incrementedKey)
+        if (fieldIndex === index) {
+          newFields[key] = state.fields[key]
+          resetFieldState(key)
+        }
         return
       }
     }

src/insert.test.js

@@ -154,6 +154,12 @@ describe('insert', () => {
           touched: true,
           error: 'A Error'
         },
+        'foo[1]': {
+          error: 'B Error',
+          name: 'foo[1]',
+          touched: false,
+          lastFieldState: undefined
+        },
         'foo[2]': {
           name: 'foo[2]',
           touched: true,
@@ -234,6 +240,11 @@ describe('insert', () => {
           touched: true,
           error: 'A Error'
         },
+        'foo[0][1]': {
+          name: 'foo[0][1]',
+          touched: false,
+          error: 'B Error'
+        },
         'foo[0][2]': {
           name: 'foo[0][2]',
           touched: true,

src/unshift.test.js

@@ -118,6 +118,11 @@ describe('unshift', () => {
         }
       },
       fields: {
+        'foo[0]': {
+          error: 'A Error',
+          name: 'foo[0]',
+          touched: false
+        },
         'foo[1]': {
           name: 'foo[1]',
           touched: true,