Add lint to CI and fix errors (#853)

Adds lint to CI and fixes errors.
I'm not sure I'm fully proud of all the solutions there.
But there's no lint issues and the lint is being checked as part of the
CI.

---------

Co-authored-by: Yuri Astrakhan <yuriastrakhan@gmail.com>

src/components/InputNumber.tsx

@@ -1,6 +1,5 @@
 import React, { BaseSyntheticEvent } from 'react'
-
-let IDX = 0;
+import generateUniqueId from '../libs/document-uid';
 
 export type InputNumberProps = {
   value?: number
@@ -32,7 +31,7 @@ export default class InputNumber extends React.Component<InputNumberProps, Input
   constructor(props: InputNumberProps) {
     super(props)
     this.state = {
-      uuid: IDX++,
+      uuid: +generateUniqueId(),
       editing: false,
       value: props.value,
       dirtyValue: props.value,
@@ -140,7 +139,7 @@ export default class InputNumber extends React.Component<InputNumberProps, Input
         }
         else {
           value = value + (step - snap);
-        };
+        }
       }
     }
 
@@ -155,7 +154,8 @@ export default class InputNumber extends React.Component<InputNumberProps, Input
 
   render() {
     if(
-      this.props.hasOwnProperty("min") && this.props.hasOwnProperty("max") &&
+      Object.prototype.hasOwnProperty.call(this.props, "min") && 
+      Object.prototype.hasOwnProperty.call(this.props, "max") &&
       this.props.min !== undefined && this.props.max !== undefined &&
       this.props.allowRange
     ) {