fix(pnpm/pnpm): support old versions (#22068)

pkgs/pnpm/pnpm/pkg.yaml

@@ -1,2 +1,12 @@
 packages:
-  - name: pnpm/pnpm@v9.0.2
+  - name: pnpm/pnpm@v9.0.4
+  - name: pnpm/pnpm
+    version: v7.0.0-alpha.0
+  - name: pnpm/pnpm
+    version: v6.20.0
+  - name: pnpm/pnpm
+    version: v6.18.0
+  - name: pnpm/pnpm
+    version: v6.16.1
+  - name: pnpm/pnpm
+    version: v6.12.1

pkgs/pnpm/pnpm/registry.yaml

@@ -5,6 +5,58 @@ packages:
     description: Fast, disk space efficient package manager
     version_constraint: "false"
     version_overrides:
+      - version_constraint: semver("<= 6.11.5")
+        no_asset: true
+      - version_constraint: semver("<= 6.12.1")
+        asset: pnpm-{{.OS}}-{{.Arch}}
+        format: raw
+        rosetta2: true
+        windows_arm_emulation: true
+        replacements:
+          amd64: x64
+          darwin: macos
+          windows: win
+        supported_envs:
+          - darwin
+          - windows
+          - amd64
+      - version_constraint: semver("<= 6.16.1")
+        asset: pnpm-{{.OS}}-{{.Arch}}
+        format: raw
+        windows_arm_emulation: true
+        replacements:
+          amd64: x64
+          darwin: macos
+          windows: win
+        supported_envs:
+          - darwin
+          - windows
+          - amd64
+      - version_constraint: semver("<= 6.18.0")
+        asset: pnpm-{{.OS}}-{{.Arch}}
+        format: raw
+        windows_arm_emulation: true
+        replacements:
+          amd64: x64
+          darwin: macos
+          windows: win
+      - version_constraint: semver("<= 6.20.0")
+        asset: pnpm-{{.OS}}-{{.Arch}}
+        format: raw
+        replacements:
+          amd64: x64
+        supported_envs:
+          - linux/amd64
+      - version_constraint: semver("<= 7.0.0-alpha.0")
+        asset: pnpm-{{.OS}}-{{.Arch}}
+        format: raw
+        windows_arm_emulation: true
+        replacements:
+          amd64: x64
+          darwin: macos
+          windows: win
+      - version_constraint: Version == "v7.0.0-alpha.1"
+        no_asset: true
       - version_constraint: "true"
         asset: pnpm-{{.OS}}-{{.Arch}}
         format: raw