Test that only open licenses are included per

https://github.com/github/choosealicense.com/blob/gh-pages/CONTRIBUTING.md#adding-a-license

- check that all licenses have minimum permissions
- remove non-open (and unused) forbiddens
- closes #1 with confidence

_data/rules.yml

@@ -42,9 +42,3 @@ forbidden:
 - description: Software is provided without warranty and the software author/license owner cannot be held liable for damages.
   label: Hold Liable
   tag: no-liability
-- description: This software may not be modified.
-  label: Modification
-  tag: modifications
-- description: You may not distribute this software.
-  label: Distribution
-  tag: distribution

spec/license_spec.rb

@@ -27,6 +27,22 @@ describe "licenses" do
           expect(approved_licenses).to include(id), "See https://git.io/vzCTV."
         end
       end
+
+      context "minimum permissions" do
+        permissions = license["permitted"]
+        it "should allow commercial use" do
+          expect(permissions).to include("commercial-use")
+        end
+        it "should allow modification" do
+          expect(permissions).to include("modifications")
+        end
+        it "should allow distribution" do
+          expect(permissions).to include("distribution")
+        end
+        it "should allow private use" do
+          expect(permissions).to include("private-use")
+        end
+      end
     end
   end
 end