[chore] upgrade to eslint 8

package.json

@@ -126,14 +126,14 @@
     "@sveltejs/eslint-config": "github:sveltejs/eslint-config#v5.8.0",
     "@types/mocha": "^7.0.0",
     "@types/node": "^8.10.53",
-    "@typescript-eslint/eslint-plugin": "^4.31.2",
-    "@typescript-eslint/parser": "^4.31.2",
+    "@typescript-eslint/eslint-plugin": "^5.22.0",
+    "@typescript-eslint/parser": "^5.22.0",
     "acorn": "^8.4.1",
     "agadoo": "^1.1.0",
     "code-red": "^0.2.5",
     "css-tree": "^1.1.2",
-    "eslint": "^7.32.0",
-    "eslint-plugin-import": "^2.24.2",
+    "eslint": "^8.0.0",
+    "eslint-plugin-import": "^2.26.0",
     "eslint-plugin-svelte3": "^3.2.1",
     "estree-walker": "^3.0.0",
     "is-reference": "^3.0.0",

src/compiler/compile/css/Selector.ts

@@ -585,7 +585,7 @@ class Block {
 	host: boolean;
 	root: boolean;
 	combinator: CssNode;
-	selectors: CssNode[]
+	selectors: CssNode[];
 	start: number;
 	end: number;
 	should_encapsulate: boolean;

src/compiler/compile/nodes/RawMustacheTag.ts

@@ -1,5 +1,5 @@
 import Tag from './shared/Tag';
 
 export default class RawMustacheTag extends Tag {
-	type: 'RawMustacheTag'
+	type: 'RawMustacheTag';
 }

src/compiler/compile/render_dom/wrappers/EachBlock.ts

@@ -61,7 +61,7 @@ export default class EachBlockWrapper extends Wrapper {
 		fixed_length: number;
 		data_length: Node | number;
 		view_length: Node | number;
-	}
+	};
 
 	context_props: Array<Node | Node[]>;
 	index_name: Identifier;