Add filter-maker per #2188

quicklisp · quicklisp · commit efa6f676b20b · 2022-09-26T16:55:34.000-04:00
diff --git a/projects/filter-maker/source.txt b/projects/filter-maker/source.txt
@@ -0,0 +1 @@
+git https://github.com/johnlorentzson/filter-maker.git

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+git https://github.com/johnlorentzson/filter-maker.git`