Fixed eslint errors

.eslintrc.json

@@ -0,0 +1,72 @@
+{
+  "env": {
+    "browser": true,
+    "node": true,
+    "es6": true,
+    "es2017": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:@typescript-eslint/recommended-requiring-type-checking"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "project": "./tsconfig.json"
+  },
+  "plugins": ["@typescript-eslint"],
+  "rules": {
+    "eol-last": ["error", "never"],
+    "semi": ["off", "never"],
+    "brace-style": "off",
+    "indent": "off",
+    "space-before-function-paren": ["off", "never"],
+    "@typescript-eslint/semi": ["error", "never"],
+    "@typescript-eslint/brace-style": ["error", "1tbs", {
+      "allowSingleLine": true
+    }],
+    "@typescript-eslint/indent": ["error", 2],
+    "@typescript-eslint/space-before-function-paren": ["error", "never"],
+    "@typescript-eslint/no-var-requires": ["off"],
+    "@typescript-eslint/no-empty-function": ["error", {
+      "allow": [
+        "constructors"
+      ]
+    }],
+    "@typescript-eslint/no-explicit-any": ["error"],
+    "@typescript-eslint/ban-ts-ignore": ["off"],
+    "@typescript-eslint/interface-name-prefix": ["off"],
+    "@typescript-eslint/member-delimiter-style": ["error", {
+      "multiline": {
+        "delimiter": "none"
+      },
+      "singleline": {
+        "delimiter": "semi",
+        "requireLast": false
+      }
+    }],
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/no-use-before-define": ["error", {
+      "functions": false,
+      "classes": false
+    }],
+    "prefer-arrow-callback": ["error", {
+      "allowUnboundThis": true
+    }],
+    "no-multi-spaces": ["error", {
+      "ignoreEOLComments": true
+    }],
+    "block-spacing": "error",
+    "no-trailing-spaces": "error",
+    "no-whitespace-before-property": "error",
+    "space-before-blocks": "error",
+    "spaced-comment": ["error", "always", {
+      "block": {
+        "balanced": true,
+        "exceptions": ["*"]
+      }
+    }],
+    "arrow-spacing": "error"
+  }
+}