Merge #1467

1467: Add building of the project before running the browser tests r=bidoubiwa a=bidoubiwa

Its not clear that the browser tests is using the build of the project and not the up to date source files.
To ensure we avoid running the test on outdated builds, this PR adds `yarn build` before the tests are ran

Co-authored-by: Charlotte Vermandel <[email protected]>

Author: meili-bors[bot]

package.json

@@ -38,7 +38,7 @@
     "test": "yarn clear_jest && jest --runInBand --verbose",
     "types:watch": "nodemon --config nodemon.json",
     "types": "yarn tsc",
-    "test:env:browser": "yarn --cwd tests/env/express && yarn --cwd tests/env/express test",
+    "test:env:browser": "yarn build && yarn --cwd tests/env/express && yarn --cwd tests/env/express test",
     "test:watch": "yarn clear_jest && yarn test --watch",
     "test:coverage": "yarn test --coverage",
     "test:ci": "yarn test --ci",