Update dev dependencies

Author: grebaldi

jest.config.js

@@ -3,7 +3,7 @@ module.exports = {
 	testEnvironment: 'node',
 	globals: {
 		'ts-jest': {
-			tsConfig: 'tsconfig.test.json'
+			tsconfig: 'tsconfig.test.json'
 		}
 	}
 };

package.json

@@ -6,11 +6,11 @@
   "types": "dist/index.d.ts",
   "license": "MIT",
   "devDependencies": {
-    "@types/jest": "^25.2.1",
-    "@types/node": "^13.11.0",
-    "jest": "^25.2.7",
-    "ts-jest": "^25.3.1",
-    "typescript": "^3.8.3"
+    "@types/jest": "^26.0.21",
+    "@types/node": "^14.14.35",
+    "jest": "^26.6.3",
+    "ts-jest": "^26.5.4",
+    "typescript": "^4.2.3"
   },
   "author": {
     "name": "Wilhelm Behncke",