Upgrading to es2018

Author: berhalak

package.json

@@ -1,7 +1,7 @@
 {
 	"name": "fromit",
 	"private": false,
-	"version": "2.1.1",
+	"version": "2.2.0",
 	"description": "Typescript linq",
 	"main": "dist/index.js",
 	"types": "dist/index.d.ts",

src/async.ts

@@ -2,7 +2,7 @@
 type Selector<T, M = any> = (item: T, index: number) => PromiseLike<M> | M;
 type Matcher<T> = (item: T) => PromiseLike<boolean> | boolean
 type Property<T> = keyof T;
-const identity: Matcher<any> = x => !!x;
+const truthy: Matcher<any> = x => !!x;
 type FlatElement<Arr, Depth extends number> = {
     "done": Arr,
     "recur": Arr extends AsyncIterable<infer InnerArr>
@@ -63,7 +63,7 @@ export abstract class AEnumerable<T> implements AsyncIterable<T> {
   }
 
   filter(matcher?: Matcher<T>): AEnumerable<T> {
-    return new Filter(this, matcher ?? identity);
+    return new Filter(this, matcher ?? truthy);
   }
 
   skip(size: number): AEnumerable<T> {

tsconfig.json

@@ -2,7 +2,7 @@
 	"compilerOptions": {
 		/* Basic Options */
 		// "incremental": true,                   /* Enable incremental compilation */
-		"target": "es2017", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
+		"target": "es2018", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
 		"module": "CommonJS", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
 		// "lib": [],                             /* Specify library files to be included in the compilation. */
 		// "allowJs": true,                       /* Allow javascript files to be compiled. */