little schema fixes

declarations/WebpackOptions.d.ts

@@ -72,11 +72,7 @@ export type AuxiliaryComment = string | LibraryCustomUmdCommentObject;
 /**
  * Specify which export should be exposed as library.
  */
-export type LibraryExport = string | ArrayOfStringValues;
-/**
- * Array of strings.
- */
-export type ArrayOfStringValues = string[];
+export type LibraryExport = string | string[];
 /**
  * The name of the library (some types allow unnamed libraries too).
  */
@@ -145,6 +141,10 @@ export type ExternalItem =
 				| boolean;
 	  }
 	| RegExp;
+/**
+ * Array of strings.
+ */
+export type ArrayOfStringValues = string[];
 /**
  * Specifies the default type of externals ('amd*', 'umd*', 'system' and 'jsonp' depend on output.libraryTarget set to the same value).
  */
@@ -890,7 +890,7 @@ export interface LibraryCustomUmdObject {
 	/**
 	 * Name of the property exposed globally by a UMD library.
 	 */
-	root?: string | ArrayOfStringValues;
+	root?: string | string[];
 }
 /**
  * Enables/Disables experiments (experiemental features with relax SemVer compatibility).

schemas/WebpackOptions.json

@@ -612,7 +612,8 @@
           "tsType": "RegExp"
         },
         {
-          "type": "string"
+          "type": "string",
+          "absolutePath": false
         },
         {
           "instanceof": "Function",
@@ -761,20 +762,28 @@
       "properties": {
         "amd": {
           "description": "Name of the exposed AMD library in the UMD.",
-          "type": "string"
+          "type": "string",
+          "minLength": 1
         },
         "commonjs": {
           "description": "Name of the exposed commonjs export in the UMD.",
-          "type": "string"
+          "type": "string",
+          "minLength": 1
         },
         "root": {
           "description": "Name of the property exposed globally by a UMD library.",
           "anyOf": [
             {
-              "type": "string"
+              "type": "string",
+              "minLength": 1
             },
             {
-              "$ref": "#/definitions/ArrayOfStringValues"
+              "type": "array",
+              "items": {
+                "description": "Part of the name of the property exposed globally by a UMD library.",
+                "type": "string",
+                "minLength": 1
+              }
             }
           ]
         }
@@ -784,10 +793,16 @@
       "description": "Specify which export should be exposed as library.",
       "anyOf": [
         {
-          "type": "string"
+          "type": "string",
+          "minLength": 1
         },
         {
-          "$ref": "#/definitions/ArrayOfStringValues"
+          "type": "array",
+          "items": {
+            "description": "Part of the export that should be exposed as library.",
+            "type": "string",
+            "minLength": 1
+          }
         }
       ]
     },
@@ -795,13 +810,15 @@
       "description": "The name of the library (some types allow unnamed libraries too).",
       "anyOf": [
         {
-          "type": "string"
+          "type": "string",
+          "minLength": 1
         },
         {
           "type": "array",
           "items": {
             "description": "A part of the library name.",
-            "type": "string"
+            "type": "string",
+            "minLength": 1
           }
         },
         {