fix: not correct error and warning codes (#855)

closes #854

Author: kazupon

packages/core-base/src/errors.ts

@@ -9,7 +9,7 @@ export interface CoreError extends CompileError {
 }
 
 let code = CompileErrorCodes.__EXTEND_POINT__
-const inc = () => code++
+const inc = () => ++code
 
 export const CoreErrorCodes = {
   INVALID_ARGUMENT: code, // 15

packages/vue-i18n-core/src/errors.ts

@@ -9,7 +9,7 @@ export interface I18nError extends CompileError {
 }
 
 let code = CompileErrorCodes.__EXTEND_POINT__
-const inc = () => code++
+const inc = () => ++code
 
 export const I18nErrorCodes = {
   // composer module errors

packages/vue-i18n-core/src/warnings.ts

@@ -2,7 +2,7 @@ import { format } from '@intlify/shared'
 import { CoreWarnCodes } from '@intlify/core-base'
 
 let code = CoreWarnCodes.__EXTEND_POINT__
-const inc = () => code++
+const inc = () => ++code
 
 export const I18nWarnCodes = {
   FALLBACK_TO_ROOT: code, // 7