refactor: fix linter issues

Author: NoNameProvided

Diff for: src/decorator/common/Validate.ts

@@ -15,7 +15,7 @@ export function ValidatorConstraint(options?: { name?: string; async?: boolean }
         if (!name) {
             name = (target as any).name;
             if (!name) // generate name if it was not given
-                name = name.replace(/\.?([A-Z]+)/g, (x, y) => "_" + y.toLowerCase()).replace(/^_/, "");
+                name = name.replace(/\.?([A-Z]+)/g, (x, y) => "_" + (y as string).toLowerCase()).replace(/^_/, "");
         }
         const metadata = new ConstraintMetadata(target, name, isAsync);
         getMetadataStorage().addConstraintMetadata(metadata);

Diff for: src/validation-schema/ValidationSchemaToMetadataTransformer.ts

@@ -2,7 +2,6 @@ import {ValidationSchema} from "./ValidationSchema";
 import {ValidationMetadata} from "../metadata/ValidationMetadata";
 import {ValidationMetadataArgs} from "../metadata/ValidationMetadataArgs";
 import {ValidationOptions} from "../decorator/ValidationOptions";
-import {ValidationTypes} from "../validation/ValidationTypes";
 
 /**
  * Used to transform validation schemas to validation metadatas.

Diff for: src/validation/Validator.ts

@@ -1,10 +1,7 @@
-import {ValidationMetadata} from "../metadata/ValidationMetadata";
-import {ValidationTypes} from "./ValidationTypes";
 import {ValidationError} from "./ValidationError";
 import {ValidatorOptions} from "./ValidatorOptions";
 import {ValidationExecutor} from "./ValidationExecutor";
 import {ValidationOptions} from "../decorator/ValidationOptions";
-import * as validator from "validator";
 
 /**
  * Validator performs validation of the given object based on its metadata.