cli: decouple template versions from cli version

packages/cli/templates/default-backend-plugin/package.json.hbs

@@ -1,6 +1,6 @@
 {
   "name": "{{name}}",
-  "version": "{{version}}",
+  "version": "{{pluginVersion}}",
   "main": "src/index.ts",
   "types": "src/index.ts",
   "license": "Apache-2.0",
@@ -23,8 +23,8 @@
       "clean": "backstage-cli clean"
     },
     "dependencies": {
-      "@backstage/backend-common": "^{{backstageVersion}}",
-      "@backstage/config": "^{{backstageVersion}}",
+      "@backstage/backend-common": "^{{version '@backstage/backend-common'}}",
+      "@backstage/config": "^{{version '@backstage/config'}}",
       "@types/express": "^4.17.6",
       "express": "^4.17.1",
       "express-promise-router": "^3.0.3",
@@ -33,7 +33,7 @@
       "yn": "^4.0.0"
     },
     "devDependencies": {
-      "@backstage/cli": "^{{backstageVersion}}",
+      "@backstage/cli": "^{{version '@backstage/cli'}}",
       "@types/supertest": "^2.0.8",
       "supertest": "^4.0.2",
       "msw": "^0.21.2"

packages/cli/templates/default-plugin/package.json.hbs

@@ -1,6 +1,6 @@
 {
   "name": "{{name}}",
-  "version": "{{version}}",
+  "version": "{{pluginVersion}}",
   "main": "src/index.ts",
   "types": "src/index.ts",
   "license": "Apache-2.0",
@@ -24,8 +24,8 @@
     "clean": "backstage-cli clean"
   },
   "dependencies": {
-    "@backstage/core": "^{{backstageVersion}}",
-    "@backstage/theme": "^{{backstageVersion}}",
+    "@backstage/core": "^{{version '@backstage/core'}}",
+    "@backstage/theme": "^{{version '@backstage/theme'}}",
     "@material-ui/core": "^4.11.0",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "4.0.0-alpha.45",
@@ -34,9 +34,9 @@
     "react-use": "^15.3.3"
   },
   "devDependencies": {
-    "@backstage/cli": "^{{backstageVersion}}",
-    "@backstage/dev-utils": "^{{backstageVersion}}",
-    "@backstage/test-utils": "^{{backstageVersion}}",
+    "@backstage/cli": "^{{version '@backstage/cli'}}",
+    "@backstage/dev-utils": "^{{version '@backstage/dev-utils'}}",
+    "@backstage/test-utils": "^{{version '@backstage/test-utils'}}",
     "@testing-library/jest-dom": "^5.10.1",
     "@testing-library/react": "^10.4.1",
     "@testing-library/user-event": "^12.0.7",