build(dialog): move theme package to peerDeps

in order to ensure state/context can be correctly used to manage theme we need a
single install of the theme package/provider. i'm moving the theme package to be
a peerDependency and it must be install separately

BREAKING CHANGE: @pluralsight/ps-design-system-theme is now a peerDependency and
must be installed separately

packages/dialog/package.json

@@ -21,12 +21,12 @@
   "dependencies": {
     "@pluralsight/ps-design-system-core": "^4.4.4",
     "@pluralsight/ps-design-system-focusmanager": "^2.0.8",
-    "@pluralsight/ps-design-system-theme": "^3.0.2",
     "@pluralsight/ps-design-system-util": "^2.0.5",
     "prop-types": "^15.7.2"
   },
   "peerDependencies": {
-    "@pluralsight/ps-design-system-normalize": "*",
+    "@pluralsight/ps-design-system-normalize": "^3.1.4",
+    "@pluralsight/ps-design-system-theme": "^3.0.2",
     "glamor": "^2.20.0",
     "react": ">=16.3.0 < 17.0.0"
   },
@@ -35,6 +35,7 @@
     "@pluralsight/ps-design-system-button": "^12.0.7",
     "@pluralsight/ps-design-system-storybook-addon-center": "^2.0.5",
     "@pluralsight/ps-design-system-storybook-addon-theme": "^3.0.0",
-    "@pluralsight/ps-design-system-text": "^12.0.4"
+    "@pluralsight/ps-design-system-text": "^12.0.4",
+    "@pluralsight/ps-design-system-theme": "^3.0.2"
   }
 }