fix: adapt install generator to libraries without project.json

BREAKING CHANGE: drop support for Nx 16, 17 and 18

Author: dianjuar

.github/workflows/backwards-compatibility-test.yml

@@ -28,24 +28,8 @@ jobs:
           - nx-version: '19.8.14'
             node-version: 18
 
-          - nx-version: '18.3.5'
-            node-version: 20
-          - nx-version: '18.3.5'
-            node-version: 18
-
-          - nx-version: '17.3.2'
-            node-version: 20
-          - nx-version: '17.3.2'
-            node-version: 18
-
-          - nx-version: '16.10.0'
-            node-version: 20
-          - nx-version: '16.10.0'
-            node-version: 18
-
     name: Backwards Compatibility Test
     uses: ./.github/workflows/smoke-test-nx-workspace.yml
     with:
       nx-version: ${{matrix.nx-version}}
       node-version: ${{matrix.node-version}}
-      verbose: true

README.md

@@ -241,7 +241,7 @@ For testing: Run through without making any changes. Execute with `--dry-run`, a
 
 | Version | Nx Workspace Version |
 | ------- | -------------------- |
-| v8.5.0  | `>=16.x  <21.x`      |
+| v9.0.0  | `>=19.x  <21.x`      |
 | v8.4.0  | `>=16.x  <20.x`      |
 | v8.2.0  | `>=16.x  <19.x`      |
 | v8.1.0  | `>=16.x  <18.x`      |