libuv: 1.19.1 -> 1.19.2

Semi-automatic update. These checks were performed:

- built on NixOS
- found 1.19.2 with grep in /nix/store/f45rl4z9a2rqd7hdhwnj9g831z1k4ilr-libuv-1.19.2
- found 1.19.2 in filename of file in /nix/store/f45rl4z9a2rqd7hdhwnj9g831z1k4ilr-libuv-1.19.2

cc "@cstrahan"