Enable tslib

package-lock.json

@@ -2326,7 +2326,7 @@
       }
     },
     "mammoth": {
-      "version": "git+file:///home/forks/work/mammoth-lib.git#5f57b780468d4f21af61fec92e584bf2c87664b2",
+      "version": "git+file:///home/forks/work/mammoth-lib.git#a386361efc3477a7c83573b708ffe29e47b9a36c",
       "requires": {
         "@types/chokidar": "1.7.4",
         "@types/history": "4.6.2",

tsconfig.json

@@ -14,7 +14,7 @@
     // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
     // "removeComments": true,                /* Do not emit comments to output. */
     // "noEmit": true,                        /* Do not emit outputs. */
-    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
+    "importHelpers": true, /* Import emit helpers from 'tslib'. */
     // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
     // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
     /* Strict Type-Checking Options */