Merge pull request #280 from aantipov/release/4rc.0

release 4-rc.0 and update jest and ts-jest to 26.x

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-jest",
-  "version": "4.0.0-beta.6",
+  "version": "4.0.0-rc.0",
   "description": "Jest Vue transform",
   "main": "lib/index.js",
   "files": [
@@ -48,7 +48,7 @@
     "hamljs": "^0.6.2",
     "husky": "^1.1.4",
     "jade": "^1.11.0",
-    "jest": "^25.1.0",
+    "jest": "^26.0.0",
     "less": "^3.9.0",
     "lint-staged": "^8.0.5",
     "prettier": "^1.16.1",
@@ -62,7 +62,7 @@
   },
   "peerDependencies": {
     "@babel/core": "7.x",
-    "jest": "^25.5.0",
+    "jest": "26.x",
     "vue": "^2.x",
     "vue-template-compiler": "^2.x"
   },
@@ -72,7 +72,7 @@
     "chalk": "^2.1.0",
     "extract-from-css": "^0.4.4",
     "source-map": "0.5.6",
-    "ts-jest": "25.5.x"
+    "ts-jest": "26.x"
   },
   "repository": {
     "type": "git",