Upgrade rush and pnpm (#697)

rush.json

@@ -15,7 +15,7 @@
    * path segment in the "$schema" field for all your Rush config files.  This will ensure
    * correct error-underlining and tab-completion for editors such as VS Code.
    */
-  "rushVersion": "5.12.0",
+  "rushVersion": "5.34.3",
   /**
    * The next field selects which package manager should be installed and determines its version.
    * Rush installs its own local copy of the package manager to ensure that your build process
@@ -24,7 +24,7 @@
    * Specify one of: "pnpmVersion", "npmVersion", or "yarnVersion".  See the Rush documentation
    * for details about these alternatives.
    */
-  "pnpmVersion": "2.15.1",
+  "pnpmVersion": "5.9.0",
   /**
    * Options that are only used when the PNPM package manager is selected
    */
@@ -101,4 +101,4 @@
       "shouldPublish": true
     }
   ]
-}
+}