fix(deps): update dependency date-fns to ^2.0.0-beta.4

Author: renovate-bot

package.json

@@ -128,7 +128,7 @@
     "vscode-languageserver-types": "^3.14.0"
   },
   "dependencies": {
-    "date-fns": "^2.0.0-alpha.24",
+    "date-fns": "^2.0.0-beta.4",
     "rxjs": "^6.4.0",
     "tagged-template-noop": "^2.1.0"
   },

yarn.lock

@@ -2190,10 +2190,10 @@ data-urls@^1.1.0:
     whatwg-mimetype "^2.2.0"
     whatwg-url "^7.0.0"
 
-date-fns@^2.0.0-alpha.24:
-  version "2.0.0-alpha.24"
-  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.0.0-alpha.24.tgz#2988c137c72275af29d7d21cc53eb52b3a8c2586"
-  integrity sha512-jpLzKHKSq0nTcZ3K5ZnTelxWmUwPepuoEaXkATwIUnc1tc+/rIooAvDMR+zdAGnwQ35eVWiyn5dikoLHjhEYeA==
+date-fns@^2.0.0-beta.4:
+  version "2.0.0-beta.4"
+  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.0.0-beta.4.tgz#3e1bf33a15da69481f81972c4a50aad762a81f2c"
+  integrity sha512-xekjYm7ZDBuzePM/GBodhi3hW3P8dd2RbuIOLBjet2E6EGFR82wHTTXCSGuDEoapqlDvsx88ymRsq85lbM7dDw==
 
 date-now@^0.1.4:
   version "0.1.4"