Add preferred citation entry

CITATION.cff

@@ -1,42 +1,45 @@
 cff-version: 1.2.0
-title: "Bonsai: an event-based framework for processing and controlling data streams"
-message: "If you use this project in your research, please cite it as below."
-type: software
-authors:
-  - given-names: Gonçalo
-    family-names: Lopes
-    orcid: 'https://orcid.org/0000-0003-0731-4945'
-  - given-names: Niccolò
-    family-names: Bonacchi
-  - given-names: João
-    family-names: Frazão
-  - given-names: Joana P.
-    family-names: Neto
-  - given-names: Bassam V.
-    family-names: Atallah
-  - given-names: Sofia
-    family-names: Soares
-  - given-names: Luís
-    family-names: Moreira
-  - given-names: Sara
-    family-names: Matias
-  - given-names: Pavel M.
-    family-names: Itskov
-  - given-names: Patrícia A.
-    family-names: Correia
-  - given-names: Roberto E.
-    family-names: Medina
-  - given-names: Lorenza
-    family-names: Calcaterra
-  - given-names: Elena
-    family-names: Dreosti
-  - given-names: Joseph J.
-    family-names: Paton
-  - given-names: Adam R.
-    family-names: Kampff
-identifiers:
-  - type: doi
-    value: 10.3389/fninf.2015.00007
+title: Bonsai
 repository-code: 'https://github.com/bonsai-rx/bonsai'
 url: 'https://bonsai-rx.org/'
 license: MIT
+preferred-citation:
+  type: article
+  authors:
+    - given-names: Gonçalo
+      family-names: Lopes
+      orcid: 'https://orcid.org/0000-0003-0731-4945'
+    - given-names: Niccolò
+      family-names: Bonacchi
+    - given-names: João
+      family-names: Frazão
+    - given-names: Joana P.
+      family-names: Neto
+    - given-names: Bassam V.
+      family-names: Atallah
+    - given-names: Sofia
+      family-names: Soares
+    - given-names: Luís
+      family-names: Moreira
+    - given-names: Sara
+      family-names: Matias
+    - given-names: Pavel M.
+      family-names: Itskov
+    - given-names: Patrícia A.
+      family-names: Correia
+    - given-names: Roberto E.
+      family-names: Medina
+    - given-names: Lorenza
+      family-names: Calcaterra
+    - given-names: Elena
+      family-names: Dreosti
+    - given-names: Joseph J.
+      family-names: Paton
+    - given-names: Adam R.
+      family-names: Kampff
+  doi: "10.3389/fninf.2015.00007"
+  journal: "Frontiers in Neuroinformatics"
+  title: "Bonsai: an event-based framework for processing and controlling data streams"
+  issue: 7
+  volume: 9
+  year: 2015