Meta tweaks

.travis.yml

@@ -1,4 +1,5 @@
 language: node_js
 node_js:
+  - '12'
   - '10'
   - '8'

package.json

@@ -47,18 +47,18 @@
 	],
 	"devDependencies": {
 		"@sindresorhus/tsconfig": "^0.4.0",
-		"@types/jsdom": "^12.2.3",
-		"@types/node": "^12.0.0",
+		"@types/jsdom": "^12.2.4",
+		"@types/node": "^12.0.10",
 		"@types/zen-observable": "^0.8.0",
-		"@typescript-eslint/eslint-plugin": "^1.5.0",
-		"@typescript-eslint/parser": "^1.10.2",
+		"@typescript-eslint/eslint-plugin": "^1.11.0",
+		"@typescript-eslint/parser": "^1.11.0",
 		"ava": "^2.1.0",
 		"del-cli": "^2.0.0",
-		"eslint-config-xo-typescript": "^0.14.0",
+		"eslint-config-xo-typescript": "^0.15.0",
 		"jsdom": "^15.0.0",
 		"rxjs": "^6.4.0",
 		"tempy": "^0.3.0",
-		"ts-node": "^8.0.3",
+		"ts-node": "^8.3.0",
 		"typescript": "^3.4.1",
 		"xo": "^0.24.0",
 		"zen-observable": "^0.8.8"
@@ -88,6 +88,8 @@
 		"rules": {
 			"import/first": "off",
 			"import/newline-after-import": "off",
+			"@typescript-eslint/promise-function-async": "off",
+			"@typescript-eslint/no-empty-function": "off",
 			"@typescript-eslint/explicit-function-return-type": "off"
 		}
 	}

readme.md

@@ -458,13 +458,8 @@ The most common mistakes I noticed in these modules was using `instanceof` for t
 - [has-emoji](https://github.com/sindresorhus/has-emoji) - Check whether a string has any emoji
 
 
-## Created by
+## Maintainers
 
 - [Sindre Sorhus](https://github.com/sindresorhus)
 - [Giora Guttsait](https://github.com/gioragutt)
 - [Brandon Smith](https://github.com/brandon93s)
-
-
-## License
-
-MIT

source/index.ts

@@ -141,7 +141,6 @@ is.nullOrUndefined = (value: unknown): value is null | undefined => is.null_(val
 is.object = (value: unknown): value is object => !is.nullOrUndefined(value) && (is.function_(value) || isObject(value));
 is.iterable = (value: unknown): value is IterableIterator<unknown> => !is.nullOrUndefined(value) && is.function_((value as IterableIterator<unknown>)[Symbol.iterator]);
 
-// eslint-disable-next-line no-use-extend-native/no-use-extend-native
 is.asyncIterable = (value: unknown): value is AsyncIterableIterator<unknown> => !is.nullOrUndefined(value) && is.function_((value as AsyncIterableIterator<unknown>)[Symbol.asyncIterator]);
 
 is.generator = (value: unknown): value is Generator => is.iterable(value) && is.function_(value.next) && is.function_(value.throw);