fixup! fix(@schematics/angular): correct tsconfig.spec.json include for spec files

Author: alan-agius4

packages/schematics/angular/application/files/common-files/tsconfig.spec.json.template

@@ -9,6 +9,7 @@
     ]
   },
   "include": [
+    "src/**/*.d.ts",
     "src/**/*<% if (standalone) { %>.spec<% } %>.ts"
   ]
 }

packages/schematics/angular/library/files/tsconfig.spec.json.template

@@ -9,6 +9,7 @@
     ]
   },
   "include": [
-     "src/**/*<% if (standalone) { %>.spec<% } %>.ts"
+    "src/**/*.d.ts",
+    "src/**/*<% if (standalone) { %>.spec<% } %>.ts"
   ]
 }