update citation file

CITATION.cff

@@ -1,15 +1,23 @@
 cff-version: 1.2.0
 message: "If you use this software, please cite it as below."
+type: software
+title: 'lisc: literature scanner'
+authors:
+- given-names: 'Thomas'
+  family-names: 'Donoghue'
+  orcid: 'https://orcid.org/0000-0001-5911-0472'
+repository-code: 'https://github.com/lisc-tools/lisc'
+url: 'https://lisc-tools.github.io/'
+license: Apache-2.0
 preferred-citation:
   type: article
+  title: "LISC: A Python Package for Scientific Literature Collection and Analysis"
   authors:
-  - family-names: "Donoghue"
-    given-names: "Thomas"
-    orcid: "https://orcid.org/0000-0001-5911-0472"
-  doi: "10.21105/joss.01674"
+  - given-names: 'Thomas'
+    family-names: 'Donoghue'
+    orcid: 'https://orcid.org/0000-0001-5911-0472'
   journal: "Journal of Open Source Software"
-  month: 9
-  title: "LISC: A Python Package for Scientific Literature Collection and Analysis"
+  doi: "10.21105/joss.01674"
   issue: 41
   volume: 4
   year: 2019