ci: fix build error

Author: nodkz

.github/workflows/nodejs.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 14.x]
+        node-version: [12.x, 14.x, 16.x]
     steps:
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.node-version }}

src/errors/index.ts

@@ -1,9 +1,9 @@
 import type { InterfaceTypeComposer, SchemaComposer } from 'graphql-compose';
-import { MongoError, getMongoErrorOTC } from './MongoError';
+import { getMongoErrorOTC } from './MongoError';
 import { ValidationError, getValidationErrorOTC } from './ValidationError';
 import { RuntimeError, getRuntimeErrorOTC } from './RuntimeError';
 
-export { MongoError, ValidationError, RuntimeError };
+export { ValidationError, RuntimeError };
 
 export function getErrorInterface(schemaComposer: SchemaComposer<any>): InterfaceTypeComposer {
   const ErrorInterface = schemaComposer.getOrCreateIFTC('ErrorInterface', (iftc) => {