0.4.0 --- follow openkal 0.10

⚠️ A REPIN AND NOTHING ELSE, AND IT IS NOT OPTIONAL.

openkal 0.10 adds five declarations, all of them to interfaces this
implementation does not provide --- so nothing here has anything to implement.

What is not optional is the version. A version requirement in this ecosystem is
EXACT and does not float up, and `openkal' is the shared dependency of every
package in the graph. An implementation left at 0.9.0 while a consumer moves to
0.10.0 does not get its own older contract: the two are irreconcilable and
nothing resolves at all. So a specification revision moves the whole graph or
none of it, and this package is part of the graph.

Author: Sunrisepeak

mcpp.toml

@@ -33,7 +33,7 @@ repo        = "https://github.com/mcpplibs/openkal-opensbi"
 # The contract, not an implementation of it. Declaring it turns a version
 # mismatch into a resolution-time message rather than a link-time one.
 [dependencies]
-openkal = "0.9.0"
+openkal = "0.10.0"
 
 # ⭐ WHAT RECEIVES CONTROL, WHICH IS A STATEMENT ABOUT THE PROGRAM.
 #