test(index): cover spawn errors (#732)

* chore: remove instanbul ignore comments

* chore: correct ignore type

* test(index): cover spawn errors in `execBinary`

* test(index): cover spawn errors in `pdfInfo`

* chore: up test threshold

* test(index): remove duplicate arrays

Author: Fdawgs

package.json

@@ -78,10 +78,10 @@
 		],
 		"coverageThreshold": {
 			"global": {
-				"branches": 95,
+				"branches": 96,
 				"functions": 100,
-				"lines": 98,
-				"statements": 98
+				"lines": 99,
+				"statements": 99
 			}
 		},
 		"injectGlobals": false,

src/index.js

@@ -538,7 +538,6 @@ function execBinary(binary, args, file, options = {}) {
 				return;
 			}
 
-			/* istanbul ignore else */
 			if (stdOut !== "") {
 				resolve(options.preserveWhitespace ? stdOut : stdOut.trim());
 			} else if (code === 0) {
@@ -667,6 +666,7 @@ class Poppler {
 			if (popplerPath) {
 				this.#popplerPath = popplerPath;
 			}
+
 			if (platform === "win32" && !popplerPath) {
 				try {
 					// @ts-ignore: Optional dependency
@@ -678,7 +678,6 @@ class Poppler {
 			}
 		}
 
-		/* istanbul ignore next: unable to test due to https://github.com/jestjs/jest/pull/14297 */
 		if (!this.#popplerPath) {
 			throw new Error(
 				`Unable to find ${platform} Poppler binaries, please pass the installation directory as a parameter to the Poppler instance.`
@@ -1262,7 +1261,6 @@ class Poppler {
 			});
 
 			child.on("close", (code) => {
-				/* istanbul ignore else */
 				if (stdOut !== "") {
 					if (fileSize) {
 						stdOut = stdOut.replace(