The imagemin-gifsicle package is used to compress gif images. The latest version of imagemin-gifsicle requires the binaries to be built from source, which has a big dependency of dh-autoreconf. pgAdmin has very few gifs. Instead of installing dh-autoreconf, I've removed imagemin-gifsicle from package.json since the cost of installing dh-autoreconf is more than the output of compressing gif.
Attached is the patch to update the JS dependencies to latest. Changes include: 1) Migrate from webpack 4 to webpack 5. This had a lot of breaking changes, so updated multiple webpack plugins and changed the config accordingly. 2) Replaced iconfont-webpack-plugin with a more maintained webfonts-loader. 3) Replaced deprecated babel-eslint with @babel/eslint-parser 4) Replaced optimize-css-assets-webpack-plugin with a more maintained css-minimizer-webpack-plugin 5) Updated all other JS packages and made the required code changes.
Note, there is an update available for slickgrid and I tried to update it. But it was not working as expected. So without wasting time, I've not updated slickgrid, and can be updated as a separate task.
