refactor(@schematics/angular): replace usage of unknown for any

Google3 is still on TypeScript 2.9.

Author: hansl

packages/schematics/angular/utility/project.ts

@@ -35,10 +35,14 @@ export function getProject<TProjectType extends ProjectType = ProjectType.Applic
   return workspace.projects[projectName] as WorkspaceProject<TProjectType>;
 }
 
-export function isWorkspaceSchema(workspace: unknown): workspace is WorkspaceSchema {
+// TODO(hans): change this any to unknown when google3 supports TypeScript 3.0.
+// tslint:disable-next-line:no-any
+export function isWorkspaceSchema(workspace: any): workspace is WorkspaceSchema {
   return !!(workspace && (workspace as WorkspaceSchema).projects);
 }
 
-export function isWorkspaceProject(project: unknown): project is WorkspaceProject {
+// TODO(hans): change this any to unknown when google3 supports TypeScript 3.0.
+// tslint:disable-next-line:no-any
+export function isWorkspaceProject(project: any): project is WorkspaceProject {
   return !!(project && (project as WorkspaceProject).projectType);
 }

packages/schematics/angular/utility/workspace-models.ts

@@ -146,5 +146,7 @@ export interface WorkspaceTargets<TProjectType extends ProjectType = ProjectType
     e2e?: E2EBuilderTarget;
     'app-shell'?: AppShellBuilderTarget;
     'extract-i18n'?: ExtractI18nBuilderTarget;
-    [key: string]: unknown;
+    // TODO(hans): change this any to unknown when google3 supports TypeScript 3.0.
+    // tslint:disable-next-line:no-any
+    [key: string]: any;
 }