Style inventory plugin not working, help!
Hi, trying to get this plugin to run:
https://github.com/getflourish/Sketch-Style-Inventory
to no avail

console error message:
```
TypeError: MSShapeGroup.shapeWithPath_ is not a function. (In 'MSShapeGroup.shapeWithPath_( shape)', 'MSShapeGroup.shapeWithPath_' is undefined)
line: 116
sourceURL: /Users/mycomputer/Library/Application Support/com.bohemiancoding.sketch3/Plugins/Style Inventory.sketchplugin/Contents/Sketch/Inventory/Generate.js
column: 49
stack: addRectangleLayer@/Users/mycomputer/Library/Application Support/com.bohemiancoding.sketch3/Plugins/Style Inventory.sketchplugin/Contents/Sketch/Inventory/Generate.js:116:49
addCheckeredBackground@/Users/mycomputer/Library/Application Support/com.bohemiancoding.sketch3/Plugins/Style Inventory.sketchplugin/Contents/Sketch/Inventory/Generate.js:63:57
generate@/Users/mycomputer/Library/Application Support/com.bohemiancoding.sketch3/Plugins/Style Inventory.sketchplugin/Contents/Sketch/Inventory/Generate.js:663:61
onRun@/Users/mycomputer/Library/Application Support/com.bohemiancoding.sketch3/Plugins/Style Inventory.sketchplugin/Contents/Sketch/Inventory/Generate.js:3306:57
```

Any help appreciated
thx!