feat: Import igraph

Author: krlmlr

DESCRIPTION

@@ -11,11 +11,14 @@ Description: A small collection of various network data sets, to use with
 License: CC BY-SA 4.0 + file LICENSE
 URL: http://igraph.org
 BugReports: https://github.com/igraph/igraphdata/issues
-Depends:
+Depends: 
     R (>= 2.10)
-Suggests:
-    igraph (>= 1.0.0),
+Imports: 
+    igraph (>= 1.5.0)
+Suggests: 
     testthat (>= 3.0.0)
+Remotes: 
+    igraph/[email protected]
 Encoding: UTF-8
 LazyData: true
 Roxygen: list(markdown = TRUE)