Replace adm-zip with zipread

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 4
+end_of_line = lf
+insert_final_newline = true
+

epub.js

@@ -7,22 +7,27 @@ try {
     // zipfile is an optional dependency:
     var ZipFile = require("zipfile").ZipFile;
 } catch (err) {
-    // Mock zipfile using pure-JS adm-zip:
-    var AdmZip = require('adm-zip');
+    var zipread = require("zipread");
 
     var ZipFile = function(filename) {
-        this.admZip = new AdmZip(filename);
-        this.names = this.admZip.getEntries().map(function(zipEntry) {
-            return zipEntry.entryName;
+        var zip = zipread(filename);
+
+        this.zip = zip;
+
+        var files = zip.files;
+
+        files = Object.values(files).filter((file) => {
+            return !file.dir;
+        }).map((file) => {
+            return file.name;
         });
+
+        this.names = files;
         this.count = this.names.length;
     };
     ZipFile.prototype.readFile = function(name, cb) {
-        this.admZip.readFileAsync(this.admZip.getEntry(name), function(buffer, error) {
-            // `error` is bogus right now, so let's just drop it.
-            // see https://github.com/cthackers/adm-zip/pull/88
-            return cb(null, buffer);
-        });
+        var buffer = this.zip.readFileSync(name);
+        return cb(null, buffer);
     };
 }
 

package.json

@@ -35,8 +35,8 @@
     "books"
   ],
   "dependencies": {
-    "adm-zip": "^0.4.11",
-    "xml2js": "^0.4.19"
+    "xml2js": "^0.4.19",
+    "zipread": "^1.3.3"
   },
   "optionalDependencies": {
     "zipfile": "^0.5.11"