feature #196 Use symfony/stimulus-testing 2.0 (tgalopin)

This PR was merged into the 2.x branch.

Discussion
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Use symfony/stimulus-testing 2.0

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Tickets       | -
| License       | MIT

Use symfony/stimulus-testing 2.0 to prepare for 2.0 release.

Commits
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0b910d5 Use symfony/stimulus-testing 2.0

Author: tgalopin

package.json

@@ -18,7 +18,7 @@
         "@babel/preset-typescript": "^7.15.0",
         "@rollup/plugin-node-resolve": "^13.0.0",
         "@rollup/plugin-typescript": "^8.3.0",
-        "@symfony/stimulus-testing": "^1.1.0",
+        "@symfony/stimulus-testing": "^2.0.1",
         "@typescript-eslint/eslint-plugin": "^5.2.0",
         "@typescript-eslint/parser": "^5.2.0",
         "babel-jest": "^27.3.1",