fix: add compatibility checks w/ semver

[agilgur5]

Summary

Add several compatibility checks using semver

• Follow-up to fix: handle all type-only imports by piping TS imports #406 (comment)
• Fixes Detect incompatible Rollup versions #9

Details

A few commits here:

• hotfix: this.load was added in Rollup 2.60.0; don't run on older versions

  • this is my bad, I didn't realize this.load came out much later than this.resolve
  • since we're backward-compatible w/ Rollup 1.26.3, add in a version check for the type-only fix
    • the type-only fix will error out in Rollup versions less than 2.60.0, so instead of erroring out, just skip this functionality
  • TODO: should move back to using semver that was removed in 08d2f5b

• deps: add back semver and use for version checking

  • reverts the semver removal in 08d2f5b
    • add back the TS version range check
  • add a Rollup version range check with $ROLLUP_VERSION_RANGE, fixes Detect incompatible Rollup versions #9
  • check this.load Rollup version with semver instead of string comparison
  • add semver to externals list
    • also remove resolve as it's no longer used as of docs/clean: formally deprecate rollupCommonJSResolveHack #367
    • and re-organize the list so that Node built-ins are in one section while deps are in another
      • makes it clearer what we're marking as external

• dx: add a nice warning when this.load is not supported

  • so it doesn't just silently skip the type-only fix on Rollup versions <2.60.0

• fix(test): add globals for strings that are replaced during build

  • TS_VERSION_RANGE, ROLLUP_VERSION_RANGE, RPT2_VERSION were previously only defined during builds, so would cause tests to fail
    • add these vars as (namespaced) globals in the Jest config so that they can be used in tests too
    • if they don't exist on global (or if global doesn't exist), then use the built strings instead
    • see in-line comments for more details
  • also reorder re placement to match the usage order in the code
  • and fix lint issues (no-string-literal)

Review Notes

Put a few commits together b/c these are all very related (would be dependent on each other) and only make a few changes to the source code anyway.

I also built the dist/ files to make sure that adding semver and $ROLLUP_VERSION_RANGE works. NOTE that this may need to be rebuilt prior to release if other PRs are merged in

Oddly enough, adding semver as an external removes it from the builds. When not an external though, it gets added to the builds (additions in the git diff).... Not sure what's going on there exactly... Maybe it's only partially rolled up currently?
package-lock.json changes shows it was in the dependency tree already, but I only saw it in devDeps 🤔 Not sure why it was in the build.
Making it external makes it more logical at least (and allows users to override the dep etc per #80 (comment))

[agilgur5]

Ack, integration tests fail because the $TS_VERSION_RANGE and $ROLLUP_VERSION_RANGE are not substituted yet in the tests (they're only replaced in the built files)... will need to handle that somehow...

[agilgur5]

Fixed the tests and lint issues now