change getComponentVersion param

Author: syzh

sdk/serverless/index.js

@@ -98,10 +98,10 @@ class Serverless {
 
  static async getComponentVersion(name, version) {
  assert(name, 'The request is missing a required parameter name')
- assert(version, 'The request is missing a required parameter version')
+ // assert(version, 'The request is missing a required parameter version')
  const componentVersion = {
  ComponentName: name,
- ComponentVersion: version
+ ComponentVersion: version || ''
  }
 
  return Serverless.doRequest('GetComponentVersion', componentVersion)