Type dependencies should be pinnable and/or be from same build

[jason0x43]

Type dependencies are not always consistent within a build, and sometimes change over time for a given build of a package. I have mostly seen this problem with react and react-dom, which will sometimes use different type dependencies for the same packages, even when pinned.

This may be related to #234.

For example, in a current project I'm importing build 68 of react and react-dom:

{
  "imports": {
    "react": "https://esm.sh/react@17.0.2?pin=v68",
    "react-dom": "https://esm.sh/react-dom@17.0.2?pin=v68"
  }
}

If I run deno info mod.ts for my project, I see the following imports for react:

│ │ │ │ └─┬ https://esm.sh/react@17.0.2?pin=v68 (172B)
│ │ │ │   ├─┬ https://cdn.esm.sh/v68/@types/react@17.0.39/index.d.ts (148.34KB)
│ │ │ │   │ ├── https://cdn.esm.sh/v68/@types/react@17.0.39/global.d.ts (7.01KB)
│ │ │ │   │ ├── https://cdn.esm.sh/v68/@types/prop-types@15.7.4/index.d.ts (3.58KB)
│ │ │ │   │ ├── https://cdn.esm.sh/v68/@types/scheduler@0.16.2/tracing.d.ts (4.03KB)
│ │ │ │   │ └── https://cdn.esm.sh/v68/csstype@3.0.11/index.d.ts (850.38KB)

And for react-dom:

│ │ └─┬ https://esm.sh/react-dom@17.0.2/server?pin=v68 (193B)
│ │   ├─┬ https://cdn.esm.sh/v68/@types/react-dom@17.0.13/server~.d.ts (1.89KB)
│ │   │ └─┬ https://cdn.esm.sh/v73/@types/react@17.0.42/index.d.ts (148.44KB)
│ │   │   ├── https://cdn.esm.sh/v73/@types/react@17.0.42/global.d.ts (7.01KB)
│ │   │   ├── https://cdn.esm.sh/v73/csstype@3.0.11/index.d.ts (850.38KB)
│ │   │   ├── https://cdn.esm.sh/@types/prop-types@15.7.4/index.d.ts (3.58KB)
│ │   │   └── https://cdn.esm.sh/@types/scheduler@0.16.2/tracing.d.ts (4.03KB)

The versions for @types/react are different for the react and react-dom dependencies, causing errors while type checking. Type dependencies can also change when new builds are published, even when a project has pinned dependencies, meaning that a build that works on one machine may break when run on another due to different package versions being downloaded.