Add imagepos to Attributes.js

[monnewbie3]

I can't seem to find imagepos for nodes.
I manually updated my Attributes.js file and it appears to work fine.
This will position the image in the node where you would like it.
Options are as follows;

• tl | Top Left
• tc | Top Centered
• tr | Top Right
• ml | Middle Left
• mc | Middle Centered (the default)
• mr | Middle Right
• bl | Bottom Left
• bc | Bottom Centered
• br | Bottom Right

"imagepos" : { "usage" : "N", "type" : "string" }

Reference: https://www.graphviz.org/doc/info/attrs.html#d:height

Thanks,

[glejeune]

Could you send a PR ?