fix: force noEmitOnError: false (#338)

- `noEmitOnError: true` acts like `noEmit: true` when there is an error
  - this is problematic because it will then cause _all_ files to have
    `emitSkipped` set to `true`, which this plugin interprets as a fatal
    error
    - meaning it will treat the first file it finds as having a fatal
      error and then abort, but possibly without outputting any
      diagnostics what-so-ever as the file with the error in it may not
      yet have run through the `transform` hook
      - i.e. an initial file that imports an erroring file at some point
        in its import chain will cause rpt2 to abort, even if that
        initial file _itself_ has no type-check/diagnostic issues
        - bc TS does whole-program analysis after all

- this has only been reported as an issue once so far, probably because
  it defaults to `false` in TS and, as such, is rarely used:
  https://www.typescriptlang.org/tsconfig#noEmitOnError
  - we usually have the opposite issue, people trying to set it to
    `false` (i.e. the default) because they don't realize the
    `abortOnError` option exists

- add `noEmitOnError: false` to the forced options list and tests too

- add it to the docs on what tsconfig options are forced
  - and add a reference to the issue like the existing options
  - also reference `abortOnError` since they're commonly associated with
    each other and that plugin option is often missed (per above)
- briefly explain that `noEmit` and `noEmitOnError` are `false` because
  Rollup controls emit settings in the context of this plugin, instead
  of `tsc` etc
  - should probably watch out for when new emit settings are added to
    TS, as we may want to force most with the same reasoning

README.md

@@ -41,7 +41,8 @@ The plugin inherits all compiler options and file lists from your `tsconfig.json
 * `noEmitHelpers`: false
 * `importHelpers`: true
 * `noResolve`: false
-* `noEmit`: false
+* `noEmit`: false (Rollup controls emit)
+* `noEmitOnError`: false (Rollup controls emit. See [#254](https://github.com/ezolenko/rollup-plugin-typescript2/issues/254) and the `abortOnError` plugin option below)
 * `inlineSourceMap`: false (see [#71](https://github.com/ezolenko/rollup-plugin-typescript2/issues/71))
 * `outDir`: `./placeholder` in cache root, see [#83](https://github.com/ezolenko/rollup-plugin-typescript2/issues/83) and [Microsoft/TypeScript#24715](https://github.com/Microsoft/TypeScript/issues/24715)
 * `declarationDir`: Rollup's `output.file` or `output.dir` (*only if `useTsconfigDeclarationDir` is false in the plugin options*)

__tests__/get-options-overrides.spec.ts

@@ -49,6 +49,7 @@ const forcedOptions: ts.CompilerOptions = {
 	inlineSourceMap: false,
 	moduleResolution: ts.ModuleResolutionKind.NodeJs,
 	noEmit: false,
+	noEmitOnError: false,
 	noEmitHelpers: false,
 	noResolve: false,
 	outDir: `${cacheDir}/placeholder`,

src/get-options-overrides.ts

@@ -13,6 +13,7 @@ export function getOptionsOverrides({ useTsconfigDeclarationDir, cacheRoot }: IO
 		importHelpers: true,
 		noResolve: false,
 		noEmit: false,
+		noEmitOnError: false,
 		inlineSourceMap: false,
 		outDir: normalize(`${cacheRoot}/placeholder`), // need an outdir that is different from source or tsconfig parsing trips up. https://github.com/Microsoft/TypeScript/issues/24715
 		moduleResolution: tsModule.ModuleResolutionKind.NodeJs,