meta: fix `yarn build:clean`

The command was mistakenly removing files inside `node_modules` folder

packages/@uppy/companion/.gitignore

@@ -34,6 +34,6 @@ test/output/*
 .DS_Store
 
 # Transpiled
-lib/
+./lib/
 infra/kube/companion/uppy-env.yaml
 scripts/.tl-deploy-hosts-danger.txt

packages/@uppy/vue/.gitignore

@@ -21,5 +21,5 @@ pnpm-debug.log*
 *.sln
 *.sw?
 
-lib
+./lib
 *.vue.js