fix(@angular-devkit/build-angular): update babel to 7.8.7

packages/angular_devkit/build_angular/package.json

@@ -11,14 +11,14 @@
     "@angular-devkit/build-optimizer": "0.0.0",
     "@angular-devkit/build-webpack": "0.0.0",
     "@angular-devkit/core": "0.0.0",
-    "@babel/core": "7.8.3",
-    "@babel/preset-env": "7.8.3",
+    "@babel/core": "7.8.7",
+    "@babel/preset-env": "7.8.7",
     "@ngtools/webpack": "0.0.0",
     "ajv": "6.10.2",
     "autoprefixer": "9.6.1",
-    "browserslist": "4.8.6",
+    "browserslist": "4.10.0",
     "cacache": "12.0.2",
-    "caniuse-lite": "1.0.30001024",
+    "caniuse-lite": "1.0.30001035",
     "circular-dependency-plugin": "5.2.0",
     "clean-css": "4.2.1",
     "coverage-istanbul-loader": "2.0.3",

packages/angular_devkit/build_angular/src/utils/process-bundle.ts

@@ -102,6 +102,17 @@ export async function process(options: ProcessBundleOptions): Promise<ProcessBun
   let downlevelCode;
   let downlevelMap;
   if (downlevel) {
+    const {supportedBrowsers: targets = []} = options;
+
+    // todo: revisit this in version 10, when we update our defaults browserslist
+    // Without this workaround bundles will not be downlevelled because Babel doesn't know handle to 'op_mini all'
+    // See: https://github.com/babel/babel/issues/11155
+    if (Array.isArray(targets) && targets.includes('op_mini all')) {
+      targets.push('ie_mob 11');
+    } else if ('op_mini' in targets) {
+      targets['ie_mob'] = '11';
+    }
+
     // Downlevel the bundle
     const transformResult = await transformAsync(sourceCode, {
       filename: options.filename,
@@ -113,7 +124,7 @@ export async function process(options: ProcessBundleOptions): Promise<ProcessBun
           require.resolve('@babel/preset-env'),
           {
             // browserslist-compatible query or object of minimum environment versions to support
-            targets: options.supportedBrowsers,
+            targets,
             // modules aren't needed since the bundles use webpack's custom module loading
             modules: false,
             // 'transform-typeof-symbol' generates slower code

tests/legacy-cli/e2e/tests/update/update-1.0.ts

@@ -13,7 +13,7 @@ export default async function() {
   await ng('update', '@angular/cli');
   await useBuiltPackages();
   await silentNpm('install');
-  await ng('update', '@angular/core', ...extraUpdateArgs);
+  await ng('update', '@angular/core@8', ...extraUpdateArgs);
   await useCIDefaults('one-oh-project');
   await ng('generate', 'component', 'my-comp');
   await ng('test', '--watch=false');

tests/legacy-cli/e2e/tests/update/update-1.7-longhand.ts

@@ -12,6 +12,6 @@ export default async function() {
   await ng('update', '@angular/cli', '--migrate-only', '--from=1.7.1');
   await useBuiltPackages();
   await silentNpm('install');
-  await ng('update', '@angular/core', ...extraUpdateArgs);
+  await ng('update', '@angular/core@8', ...extraUpdateArgs);
   await ng('build');
 }

tests/legacy-cli/e2e/tests/update/update-1.7.ts

@@ -15,7 +15,7 @@ export default async function() {
   await ng('update', '@angular/cli');
   await useBuiltPackages();
   await silentNpm('install');
-  await ng('update', '@angular/core', ...extraUpdateArgs);
+  await ng('update', '@angular/core@8', ...extraUpdateArgs);
   await useCIDefaults('latest-project');
   await ng('generate', 'component', 'my-comp');
   await ng('test', '--watch=false');

tests/legacy-cli/e2e/tests/update/update-7.0.ts

@@ -44,7 +44,7 @@ export default async function() {
   await silentNpm('install');
 
   // Update Angular.
-  await ng('update', '@angular/core', ...extraUpdateArgs);
+  await ng('update', '@angular/core@8', ...extraUpdateArgs);
 
   // Run CLI commands.
   await ng('generate', 'component', 'my-comp');