Upgrade dependencies

package.json

@@ -48,34 +48,31 @@
 		"object"
 	],
 	"dependencies": {
-		"type-fest": "^0.18.0"
+		"type-fest": "^0.20.2"
 	},
 	"devDependencies": {
 		"@sindresorhus/is": "^4.0.0",
-		"@sindresorhus/tsconfig": "^0.7.0",
+		"@sindresorhus/tsconfig": "^0.8.0",
 		"@types/lodash.isequal": "^4.5.5",
-		"@types/node": "^14.14.6",
+		"@types/node": "^14.14.10",
 		"@types/vali-date": "^1.0.0",
-		"@typescript-eslint/eslint-plugin": "^4.6.0",
-		"@typescript-eslint/parser": "^4.6.0",
-		"add-asset-webpack-plugin": "^1.0.0",
+		"add-asset-webpack-plugin": "^2.0.0",
 		"add-module-exports-webpack-plugin": "^2.0.0",
 		"ava": "^2.0.0",
 		"awesome-typescript-loader": "^5.2.1",
 		"callsites": "^3.1.0",
-		"codecov": "^3.8.0",
+		"codecov": "^3.8.1",
 		"del-cli": "^3.0.1",
-		"dot-prop": "^6.0.0",
-		"eslint-config-xo-typescript": "^0.35.0",
+		"dot-prop": "^6.0.1",
 		"license-webpack-plugin": "^2.3.1",
 		"lodash.isequal": "^4.5.0",
 		"nyc": "^15.1.0",
 		"typedoc": "^0.19.2",
-		"typescript": "~4.0.5",
+		"typescript": "~4.1.2",
 		"vali-date": "^1.0.0",
-		"webpack": "^5.3.1",
-		"webpack-cli": "^4.1.0",
-		"xo": "^0.34.1"
+		"webpack": "^5.8.0",
+		"webpack-cli": "^4.2.0",
+		"xo": "^0.35.0"
 	},
 	"browser": {
 		"./dist/source/utils/infer-label.js": "./dist/source/utils/infer-label.browser.js"

source/predicates/predicate.ts

@@ -78,7 +78,7 @@ export class Predicate<T = unknown> implements BasePredicate<T> {
 			...this.options
 		};
 
-		const x = this.type[0].toLowerCase() + this.type.slice(1);
+		const typeString = this.type.charAt(0).toLowerCase() + this.type.slice(1);
 
 		this.addValidator({
 			message: (value, label) => {
@@ -88,7 +88,7 @@ export class Predicate<T = unknown> implements BasePredicate<T> {
 				// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
 				return `Expected ${label_ || 'argument'} to be of type \`${this.type}\` but received type \`${is(value)}\``;
 			},
-			validator: value => (is as any)[x](value)
+			validator: value => (is as any)[typeString](value)
 		});
 	}
 
@@ -195,7 +195,7 @@ export class Predicate<T = unknown> implements BasePredicate<T> {
 	message(newMessage: string | ValidatorMessageBuilder<T>) {
 		const {validators} = this.context;
 
-		validators[validators.length - 1].message = (value, label) => {
+		validators[validators.length - 1]!.message = (value, label) => {
 			if (typeof newMessage === 'function') {
 				return newMessage(value, label);
 			}

source/utils/infer-label.ts

@@ -21,6 +21,9 @@ export const inferLabel = (callsites: readonly CallSite[]) => {
 
 	// Grab the stackframe with the `ow` function call
 	const functionCallStackFrame = callsites[1];
+	if (!functionCallStackFrame) {
+		return;
+	}
 
 	const fileName = functionCallStackFrame.getFileName();
 	const lineNumber = functionCallStackFrame.getLineNumber();

source/utils/match-shape.ts

@@ -73,7 +73,7 @@ export function exact(object: Record<string, any>, shape: Shape, parent?: string
 		}
 
 		if (objectKeys.size > 0) {
-			const firstKey = [...objectKeys.keys()][0];
+			const firstKey = [...objectKeys.keys()][0]!;
 			const label = parent ? `${parent}.${firstKey}` : firstKey;
 			return `Did not expect property \`${label}\` to exist, got \`${object[firstKey]}\``;
 		}

test/weak-map.ts

@@ -41,7 +41,7 @@ test('weakMap.hasKeys', t => {
 	}, 'Expected WeakMap to have keys `[{"rainbow":true}]`');
 
 	t.throws(() => {
-		ow(new WeakMap([[keys[0], 1], [keys[2], 3]]), ow.weakMap.hasKeys(...keys));
+		ow(new WeakMap([[keys[0]!, 1], [keys[2]!, 3]]), ow.weakMap.hasKeys(...keys));
 	}, 'Expected WeakMap to have keys `[{"x":2},{"x":4},{"x":5},{"x":6},{"x":7}]`');
 });
 

test/weak-set.ts

@@ -51,7 +51,7 @@ test('weakSet.has', t => {
 	}, 'Expected WeakSet to have items `[{"rainbow":"🌈"}]`');
 
 	t.throws(() => {
-		ow(new WeakSet([keys[1], keys[3]]), ow.weakSet.has(...keys));
+		ow(new WeakSet([keys[1]!, keys[3]!]), ow.weakSet.has(...keys));
 	}, 'Expected WeakSet to have items `[{"x":1},{"x":3},{"x":5},{"x":6},{"x":7}]`');
 });