[meta] use legacy peer deps, for npm 7

ljharb · ljharb · commit 57baba5ceacc · 2021-02-09T12:14:11.000-08:00
diff --git a/.npmrc b/.npmrc
@@ -1,2 +1,3 @@
 package-lock=false
 update-notifier=false
+legacy-peer-deps=true
