fix(@angular-devkit/build-angular): add default value to progress option

(cherry picked from commit 51d6c3c)

Author: alan-agius4

packages/angular_devkit/build_angular/src/browser/index.ts

@@ -287,7 +287,7 @@ export function buildWebpackBrowser(
           // tslint:disable-next-line: no-big-function
           concatMap(async buildEvent => {
             const spinner = new Spinner();
-            spinner.enabled = !!options.progress;
+            spinner.enabled = options.progress !== false;
 
             const { webpackStats: webpackRawStats, success, emittedFiles = [] } = buildEvent;
             if (!webpackRawStats) {

packages/angular_devkit/build_angular/src/browser/schema.json

@@ -185,7 +185,8 @@
     },
     "progress": {
       "type": "boolean",
-      "description": "Log progress to the console while building."
+      "description": "Log progress to the console while building.",
+      "default": true
     },
     "i18nFile": {
       "type": "string",

packages/angular_devkit/build_angular/src/karma/schema.json

@@ -98,7 +98,8 @@
     },
     "progress": {
       "type": "boolean",
-      "description": "Log progress to the console while building."
+      "description": "Log progress to the console while building.",
+      "default": true
     },
     "watch": {
       "type": "boolean",

packages/angular_devkit/build_angular/src/server/schema.json

@@ -117,7 +117,8 @@
     },
     "progress": {
       "type": "boolean",
-      "description": "Log progress to the console while building."
+      "description": "Log progress to the console while building.",
+      "default": true
     },
     "i18nFile": {
       "type": "string",