Bump jest (and related packages) to v26.6.3 (#83724)

Co-authored-by: Tyler Smalley <tyler.smalley@elastic.co>

package.json

@@ -693,15 +693,15 @@
     "is-glob": "^4.0.1",
     "is-path-inside": "^3.0.2",
     "istanbul-instrumenter-loader": "^3.0.1",
-    "jest": "^26.4.2",
+    "jest": "^26.6.3",
     "jest-canvas-mock": "^2.2.0",
-    "jest-circus": "^26.4.2",
-    "jest-cli": "^26.4.2",
-    "jest-diff": "^26.4.2",
+    "jest-circus": "^26.6.3",
+    "jest-cli": "^26.6.3",
+    "jest-diff": "^26.6.2",
     "jest-environment-jsdom-thirteen": "^1.0.1",
     "jest-raw-loader": "^1.0.1",
     "jest-silent-reporter": "^0.2.1",
-    "jest-snapshot": "^26.4.2",
+    "jest-snapshot": "^26.6.2",
     "jest-specific-snapshot": "2.0.0",
     "jest-styled-components": "^7.0.2",
     "jest-when": "^2.7.2",