fix(ts): ensure typechecks pass without peer deps installed

- @ts-* comments are meaningful comments, but typescript does not preserve them 🙃🙄
- re-implemented 779cddf as build plugin
- microsoft/TypeScript#38628
- microsoft/TypeScript#38628 (comment)

Signed-off-by: Lexus Drumgold <[email protected]>

Author: unicornware

build.config.ts

@@ -4,6 +4,7 @@
  */
 
 import { defineBuildConfig, type Config } from '@flex-development/mkbuild'
+import type { BuildResult, PluginBuild } from 'esbuild'
 import pkg from './package.json' assert { type: 'json' }
 
 /**
@@ -13,7 +14,40 @@ import pkg from './package.json' assert { type: 'json' }
  */
 const config: Config = defineBuildConfig({
   entries: [
-    { dts: 'only' },
+    {
+      dts: 'only',
+      plugins: [
+        {
+          name: 'ts-ignore-peers',
+          setup({ onEnd }: PluginBuild): void {
+            return void onEnd((result: BuildResult<{ write: false }>): void => {
+              const { outputFiles } = result
+
+              /**
+               * Regular expression used to insert `// @ts-ignore` above
+               * property declarations.
+               *
+               * @const {RegExp} regex
+               */
+              const regex: RegExp = /\n( +)(.+?\??: )(import\('node-fetch'\).+)/
+
+              /**
+               * Property declaration with `// @ts-ignore` prepended.
+               *
+               * @const {string} replacement
+               */
+              const replacement: string =
+                '\n$1// @ts-ignore peer dependency\n$1$2$3'
+
+              return void (result.outputFiles = outputFiles.map(output => ({
+                ...output,
+                text: output.text.replace(regex, replacement)
+              })))
+            })
+          }
+        }
+      ]
+    },
     {
       dts: false,
       pattern: ['**/index.ts', 'enums/*', 'internal/*', 'utils/*'],

src/interfaces/options-get-format.ts

@@ -74,7 +74,6 @@ interface GetFormatOptions {
    *
    * @default {}
    */
-  // @ts-ignore peer dependency
   req?: import('node-fetch').RequestInit | undefined
 }
 

src/interfaces/options-get-source.ts

@@ -52,7 +52,6 @@ interface GetSourceOptions {
    *
    * @default {}
    */
-  // @ts-ignore peer dependency
   req?: import('node-fetch').RequestInit | undefined
 }