Upgrade to Kea 2.2 (elastic#77047)

This PR updates Kea from the last RC to the stable release 2.2.

x-pack/package.json

@@ -195,7 +195,7 @@
     "jsdom": "13.1.0",
     "jsondiffpatch": "0.4.1",
     "jsts": "^1.6.2",
-    "kea": "2.2.0-rc.4",
+    "kea": "^2.2.0",
     "loader-utils": "^1.2.3",
     "lz-string": "^1.4.4",
     "madge": "3.4.4",

yarn.lock

@@ -18283,10 +18283,10 @@ kdbush@^3.0.0:
   resolved "https://registry.yarnpkg.com/kdbush/-/kdbush-3.0.0.tgz#f8484794d47004cc2d85ed3a79353dbe0abc2bf0"
   integrity sha512-hRkd6/XW4HTsA9vjVpY9tuXJYLSlelnkTmVFu4M9/7MIYQtFcHpbugAU7UbOfjOiVSVYl2fqgBuJ32JUmRo5Ew==
 
-kea@2.2.0-rc.4:
-  version "2.2.0-rc.4"
-  resolved "https://registry.yarnpkg.com/kea/-/kea-2.2.0-rc.4.tgz#cc0376950530a6751f73387c4b25a39efa1faa77"
-  integrity sha512-pYuwaCiJkBvHZShi8kqhk8dC4DjeELdK51Lw7Pn0tNdJgZJDF6COhsUiF/yrh9d7woNYDxKfuxH+QWZFfo8PkA==
+kea@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/kea/-/kea-2.2.0.tgz#1ba4a174a53880cca8002a67cf62b19b30d09702"
+  integrity sha512-IzgTC6SC89wTLfiBMPlduG4r4YanxONYK4werz8RMZxPvcYw4XEEK8xQJguwVYtLCEGm4x5YiLCubGqGfRcbEw==
 
 kew@~0.1.7:
   version "0.1.7"