fix type imports #43

Author: tbela99

src/lib/parser/parse.ts

@@ -28,7 +28,7 @@ import {
     walkValues
 } from "../ast";
 import {tokenize} from "./tokenize";
-import {
+import type {
     AstAtRule,
     AstComment,
     AstDeclaration,

src/lib/renderer/sourcemap/sourcemap.ts

@@ -51,7 +51,7 @@ export class SourceMap {
         }
     }
 
-    toUrl() {
+    toUrl(): string {
 
         // /*# sourceMappingURL = ${url} */
         return `data:application/json,${encodeURIComponent(JSON.stringify(this.toJSON()))}`;

src/lib/validation/selector.ts

@@ -1,4 +1,4 @@
-import {
+import type {
     AstAtRule,
     AstNode,
     AttrToken,
@@ -13,7 +13,7 @@ import {
 } from "../../@types";
 import {EnumToken, ValidationLevel} from "../ast";
 import {getConfig} from "./config";
-import {ValidationResult} from "../../@types/validation";
+import type {ValidationResult} from "../../@types/validation";
 
 const expressions: EnumToken[] = [
     EnumToken.DelimTokenType, EnumToken.IncludeMatchTokenType, EnumToken.DashMatchTokenType,