Relicense to 0BSD.

This is effectively the license that was already used, I just didn't know it
already existed and was OSI-approved.

Directory.Build.props

@@ -30,7 +30,7 @@ Windows console host and the many limitations it had. System.Terminal provides
 an API centered around a VT100 terminal with some extensions from later models
 and modern terminal emulators. It works on all desktop platforms that .NET 6+
 supports.</PackageDescription>
-        <PackageLicenseExpression>ISC</PackageLicenseExpression>
+        <PackageLicenseExpression>0BSD</PackageLicenseExpression>
         <PackageOutputPath>$(MSBuildThisFileDirectory)pkg/feed/</PackageOutputPath>
         <PackageProjectUrl>https://github.com/alexrp/system-terminal</PackageProjectUrl>
         <PublishRepositoryUrl>true</PublishRepositoryUrl>

LICENSE.md

@@ -1,19 +1,12 @@
-# License
-
-Unless otherwise stated, all code and documentation is available under the
-following terms:
-
-```text
-Copyright © Alex Rønne Petersen
-
-Permission to use, copy, modify, and/or distribute this software for any
-purpose with or without fee is hereby granted.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-```
+# 0BSD License
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.