Merge pull request #451 from twilio/set-node-12-v3

fix node 12

Author: ktalebian

.gitignore

@@ -66,6 +66,7 @@ lerna-debug.log
 dist/
 plugin-test/
 **/node_modules
+.ultra.cache.json
 
 # Package Locks
 package-lock.json

packages/flex-plugin-scripts/src/clients/builds.ts

@@ -10,6 +10,7 @@ export interface BuildData {
   FunctionVersions: string[];
   AssetVersions: string[];
   Dependencies: object;
+  Runtime?: string;
 }
 
 export default class BuildClient extends BaseClient {
@@ -33,6 +34,7 @@ export default class BuildClient extends BaseClient {
    */
   public create = (data: BuildData): Promise<Build> => {
     return new Promise(async (resolve, reject) => {
+      data.Runtime = 'node12';
       const newBuild = await this._create(data);
       const sid = newBuild.sid;