title: secureTextEntry is not hashing my password React Native
body: <p>When I type my pin password inside my app it shows the digits without hashing them. Is secureTextEntry is the right property for password encryption or is there something else?</p>
  
  <p>SetPinScreen.js:</p>
  
  <pre><code>return (
          &lt;View style={{width: 250, height: 170, backgroundColor: Colors.trans, alignItems: 'center'}}&gt;
              &lt;Text style={{fontSize: 20, textAlign: 'center', color: this.props.color}}&gt;{this.props.title}&lt;/Text&gt;    
              &lt;TextInput 
                  ref={"pinTextField"}
                  maxLength={4}
                  clearTextOnFocus={true}
                  style={{fontFamily: 'Roboto', width: 160, height: 100, borderBottomWidth: this.props.showUnderline === true?1:0, borderBottomColor: this.props.color, fontSize: 60, textAlign: 'center', color: this.props.color}}
                  value={this.state.inputCode} 
                  clearTextOnFocus={true}
                  autoFocus={true}
                  secureTextEntry={true}
                  keyboardType={"phone-pad"}
                  onBlur={this.onKeepKeyboardVisible}
                  autoCorrect={false}
                  autoCapitalize={"sentences"}
                  caretHidden={true}
                  underlineColorAndroid='transparent'
                  onChangeText={(text) =&gt; this.handleTextChange(text)}/&gt;
              &lt;Text style={{fontSize: 16, textAlign: 'center', color: Colors.red}}&gt;{this.state.errorMsg}&lt;/Text&gt;   
          &lt;/View&gt;
      );
  </code></pre>