schema does not define a "resolutions" field

I just used this esy config to install `ocaml-lsp-server` on macOS Big Sur, and now the schema validation is showing it as incorrect. It thinks the only valid value type inside `resolutions` is `string`.

I guess that's because there isn't a specific `resolutions` field defined in the schema?

```
{
"dependencies": {
"@opam/ocaml-lsp-server": "*",
"@opam/ocamlfind-secondary": "*",
"@opam/reason": "*",
"ocaml": "4.6.x"
},
"resolutions": {
"ocaml": {
"source": "esy-ocaml/ocaml#1805622dc40c1c569a1720078b5707eeba32b07d",
"override": {
"build": [
"./esy-configure -no-cfi -cc \"gcc -Wno-implicit-function-declaration\" -prefix $cur__install",
"./esy-build"
]
}
}
}
}
```