Merge branch 'rljacob/prep-v2.1-release' (PR #5389)

Update README, LICENSE and codemeta.json for v2.1.0.
Also add a CITATION.cff file which github and zenodo support.

CITATION.cff

@@ -0,0 +1,15 @@
+# This CITATION.cff file was generated with cffinit.
+# Visit https://bit.ly/cffinit to generate yours today!
+
+cff-version: 1.2.0
+title: Energy Exascale Earth System Model
+message: '  If you use this software, please cite it using the metadata from this file.'
+type: software
+authors:
+  - given-names: E3SM
+    family-names: Project
+version: 2.1.0
+doi: 10.11578/E3SM/dc.20230110.5
+repository-code: 'https://github.com/E3SM-Project/E3SM'
+url: 'https://e3sm.org'
+license: BSD-3-Clause

LICENSE

@@ -2,7 +2,7 @@ Except for the separable pieces descibed below, E3SM is released
 under the following 3-Clause BSD Open Source license.
 
 *******************************************************************************
-Copyright ©2021, UChicago Argonne, LLC All Rights Reserved
+Copyright ©2023, UChicago Argonne, LLC All Rights Reserved
 
 Software Name: Energy Exascale Earth System Model (E3SM)
 

README.md

@@ -9,7 +9,7 @@ the most challenging and demanding climate-change research problems and
 Department of Energy mission needs while efficiently using DOE Leadership
 Computing Facilities.  
 
-DOI: [10.11578/E3SM/dc.20210927.1](http://dx.doi.org/10.11578/E3SM/dc.20210927.1)
+DOI: [10.11578/E3SM/dc.20230110.5](http://dx.doi.org/10.11578/E3SM/dc.20230110.5)
 
 Please visit the [project website](https://e3sm.org) or our [Confluence site](https://acme-climate.atlassian.net/wiki/spaces/DOC/overview)
 for further details.
@@ -64,11 +64,11 @@ the following BibTeX entry is provided.
 	author = {{E3SM Project}},
 	abstractNote = {{E3SM} is a state-of-the-art fully coupled model of the {E}arth's 
 		climate including important biogeochemical and cryospheric processes.},
-	howpublished = {[Computer Software] \url{https://dx.doi.org/10.11578/E3SM/dc.20210927.1}},
-	url = {https://dx.doi.org/10.11578/E3SM/dc.20210927.1},
-	doi = {10.11578/E3SM/dc.20210927.1},
-	year = 2021,
-	month = sep,
+	howpublished = {[Computer Software] \url{https://dx.doi.org/10.11578/E3SM/dc.20230110.5}},
+	url = {https://dx.doi.org/10.11578/E3SM/dc.20230110.5},
+	doi = {10.11578/E3SM/dc.20230110.5},
+	year = 2023,
+	month = jan,
 }
 ```
 

codemeta.json

@@ -7,11 +7,11 @@
       "name": "E3SM Project",
     }
   ],
-  "identifier": "http://dx.doi.org/10.11578/E3SM/dc.20180418.36",
+  "identifier": "http://dx.doi.org/10.11578/E3SM/dc.20230110.5",
   "codeRepository": "https://github.com/E3SM-Project/E3SM",
-  "datePublished": "2018-04-20",
+  "datePublished": "2023-01-11",
   "keywords": "climate modeling",
   "license": "BSD",
   "title": "Energy Exascale Earth System Model",
-  "version": "v1.0.0"
+  "version": "v2.1.0"
 }