feat(yarnrc): do not use `save-prefix` (i.e. `^`, `~`) for npm package installation
feat(yarnrc): do not use `save-prefix` (i.e. `^`, `~`) for npm package installation

Always save the exact version number specified to `package.json` in
every npm package installation.

shoichiaizawa/dotfiles,shoichiaizawa/dotfiles,shoichiaizawa/dotfiles