fix(core): fix device lookup after puppeteer upgrade (#126) (#125)

Summary:
Fix an issue reported from OSS usage:
#126

Closes #125

Reviewed By: twobassdrum

Differential Revision: D61502413

fbshipit-source-id: bbb7732d446c6d94d9440bc00929d76313ba8808

packages/core/src/lib/Config.ts

@@ -54,7 +54,7 @@ const devices = constant.isFRL
   : constant.isFB
   ? require('puppeteer-core/DeviceDescriptors')
   : // eslint-disable-next-line @typescript-eslint/no-var-requires
-    require('puppeteer').devices;
+    require('puppeteer').KnownDevices;
 
 // default viewport config for desktop
 const windowWidth = 1680;