Step back versions to 0.x to signal non-finished status

packages/app/package.json

@@ -1,14 +1,14 @@
 {
   "name": "@spotify-backstage/app",
-  "version": "0.1.0",
+  "version": "0.0.0",
   "private": true,
   "dependencies": {
     "@material-ui/core": "^4.9.1",
     "@material-ui/icons": "^4.9.1",
-    "@spotify-backstage/cli": "^1.2.0",
-    "@spotify-backstage/core": "1.0.0",
-    "@spotify-backstage/plugin-home-page": "0.0.0",
-    "@spotify-backstage/plugin-welcome": "0.0.0",
+    "@spotify-backstage/cli": "^0.1.0",
+    "@spotify-backstage/core": "^0.1.0",
+    "@spotify-backstage/plugin-home-page": "^0.1.0",
+    "@spotify-backstage/plugin-welcome": "^0.1.0",
     "@testing-library/jest-dom": "^4.2.4",
     "@testing-library/react": "^9.3.2",
     "@testing-library/user-event": "^7.1.2",

packages/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@spotify-backstage/cli",
-  "version": "1.4.0",
+  "version": "0.1.0",
   "main": "dist",
   "license": "Apache-2.0",
   "private": false,

packages/core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@spotify-backstage/core",
-  "version": "1.0.0",
+  "version": "0.1.0",
   "license": "Apache-2.0",
   "private": false,
   "main": "dist/cjs/index.js",
@@ -11,7 +11,7 @@
     "test": "web-scripts test"
   },
   "dependencies": {
-    "@spotify-backstage/cli": "^1.2.0",
+    "@spotify-backstage/cli": "^0.1.0",
     "@material-ui/core": "^4.9.1",
     "@material-ui/icons": "^4.9.1",
     "@types/google-protobuf": "^3.7.2",