Filters Are Not Working in Adobe XD
**Which version of the plugin are you using?**
[ ] Data Populator for Sketch
[ x ] Data Populator for Adobe XD

**Describe the bug**
I am using the syntax {gender | max 1} in my text layer inside Adobe XD because I want to get the first letter of the gender to display in my UI, but instead it's failing and displaying the entire word: "Male" instead of just the letter "M".

I tried using other filters such as {gender | upper} but that wasn't working either. Doesn't seem like any of them are working.

Are filters a "Sketch-only" feature? If so, your website should say that because there is nothing that says filters are unique to Sketch.

**To Reproduce**
Steps to reproduce the behavior:
1. In Adobe XD, make a text layer
2. Type: {gender | max 1}
3. In the linked JSON file, make sure there is a value for the gender such as "male" or "female" etc...
4. Run the data populator plugin and verify that the filter is being correctly applied.

**Expected behavior**
I expect the filter to restrict the value in the UI to only display one character.

**Screenshots**
<img width="897" alt="Screen Shot 2020-08-04 at 2 05 19 PM" src="https://user-images.githubusercontent.com/514812/89328565-92b62500-d65b-11ea-8a8f-3a7f4fd64632.png">

<img width="660" alt="Screen Shot 2020-08-04 at 2 01 30 PM" src="https://user-images.githubusercontent.com/514812/89328216-0c014800-d65b-11ea-828a-7373db4ff0a0.png">


**Environment (please complete the following information):**
 - macOS Version: macOS Catalina 10.15.5 (19F101)
 - Adobe XD Version 31.2.12.4
 - Plugin Version 3.5.0
