fix(update): export update function to be public available

Author: michaelwittwer

src/dynamo/expression/index.ts

@@ -2,4 +2,5 @@ export * from './logical-operator/and.function'
 export * from './logical-operator/or.function'
 export * from './logical-operator/not.function'
 export * from './logical-operator/attribute.function'
+export * from './logical-operator/update.function'
 export * from './type/condition-operator.type'

src/dynamo/request/update/update.request.ts

@@ -22,6 +22,7 @@ import { BaseRequest } from '../base.request'
 
 export type Bla = { [key in UpdateActionKeyword]: Expression[] }
 
+// TODO add if no operations are defined, don't execute
 export class UpdateRequest<T> extends BaseRequest<T, any> {
   constructor(
     dynamoRx: DynamoRx,