fix(deps): remove peer dep on devkit/architect

@angular-devkit/architect does not follow semver correctly. Switching peer deps to use
build-angular, which provides architect already

ref #460

Author: mhartington

package-lock.json

@@ -81,7 +81,7 @@
     "typescript-eslint-language-service": "^4.1.3"
   },
   "peerDependencies": {
-    "@angular-devkit/architect": "^0.1201.1",
+    "@angular-devkit/build-angular": "^12.0.0",
     "@angular-devkit/schematics": "^12.0.0"
   },
   "builders": "./builders.json",