Yarn outputted

[littlejo]

Quand je lance yarn, voici mon output:

yarn install v1.22.4
info No lockfile found.
[1/5] Validating package.json...
[2/5] Resolving packages...
warning karma > minimatch@0.2.14: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
warning karma > glob > minimatch@0.2.14: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue
warning karma > chokidar@0.8.4: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies.
warning karma > coffee-script@1.6.3: CoffeeScript on NPM has moved to "coffeescript" (no hyphen)
warning karma > graceful-fs@1.2.3: please upgrade to graceful-fs 4 for compatibility with current and future versions of Node.js
warning karma > glob > graceful-fs@1.2.3: please upgrade to graceful-fs 4 for compatibility with current and future versions of Node.js
warning karma > rimraf > graceful-fs@1.2.3: please upgrade to graceful-fs 4 for compatibility with current and future versions of Node.js
warning karma > connect@2.8.8: connect 2.x series is deprecated
warning http-server > ecstatic@0.4.13: jfhbrook/node-ecstatic#259
warning http-server > portfinder > mkdirp@0.0.7: Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.)
[3/5] Fetching packages...
info fsevents@0.2.1: The platform "linux" is incompatible with this module.
info "fsevents@0.2.1" is an optional dependency and failed compatibility check. Excluding it from installation.
[4/5] Linking dependencies...
warning " > @components/angular-bootstrap@2.5.0" has unmet peer dependency "angular@>= 1.4.0-beta.0 || >= 1.5.0-beta.0".
warning " > @components/angular-ui-router@1.0.26" has unmet peer dependency "angular@>=1.2.0".
warning " > karma@0.10.10" has unmet peer dependency "karma-jasmine@~0.1.0".
warning " > karma@0.10.10" has unmet peer dependency "karma-requirejs@~0.2.0".
warning " > karma@0.10.10" has unmet peer dependency "karma-coffee-preprocessor@~0.1.0".
warning " > karma@0.10.10" has unmet peer dependency "karma-html2js-preprocessor@~0.1.0".
warning " > karma@0.10.10" has unmet peer dependency "karma-chrome-launcher@~0.1.0".
warning " > karma@0.10.10" has unmet peer dependency "karma-firefox-launcher@~0.1.0".
warning " > karma@0.10.10" has unmet peer dependency "karma-phantomjs-launcher@~0.1.0".
warning " > karma@0.10.10" has unmet peer dependency "karma-script-launcher@~0.1.0".
[5/5] Building fresh packages...
success Saved lockfile.
$ node -e "try { require('fs').symlinkSync(require('path').resolve('node_modules/@components'), 'libreosteoweb/static/components', 'junction') } catch (e) { }"
Done in 109.39s.

Est-ce que c'est normal tous ces warning ?