Merge branch 'lufei-fix/licenses'

Author: shuashuai

docs/release/LICENSE

@@ -276,7 +276,7 @@ The following components are provided under the MIT License. See project link fo
    (MIT License) tidwall-gjson (https://github.com/tidwall/gjson) [link](./licenses/LICENSE-tidwall-gjson.txt)
    (MIT License) yuin-goldmark (https://github.com/yuin/goldmark) [link](./licenses/LICENSE-yuin-goldmark.txt)
    (MIT License) go-gomail-gomail (https://gopkg.in/gomail.v2) [link](./licenses/LICENSE-go-gomail-gomail.txt)
-   (MIT License) front-matter (https://github.com/jxson/front-matter) [link](./licenses/LICENSE-front-matter.txt)
+   (MIT License) front-matter (https://github.com/jxson/front-matter) [link](./licenses/LICENSE-jxson-front-matter.txt)
    (MIT License) js-sha256 (https://github.com/emn178/js-sha256) [link](./licenses/LICENSE-emn178-js-sha256.txt)
 
 ========================================================================

docs/release/licenses/LICENSE-codemirror.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.