Depend on bjosql 0.3.2 and name the datetime types it uses

bjosql 0.3.0 does not build with Bjolang 0.1.0: its only lists leave out
the types it names. 0.3.2 names them, so the manifest asks for it and the
lock pins it.

Bjolang 0.1.0 also requires a type to be in an (only ...) list for a module
to name it. core.bjo names Time and DateTime of (std datetime), so they are
now in its list.

🤖 Generated with [ECA](https://eca.dev) (anthropic/claude-opus-4-7)

Co-Authored-By: eca-agent <git@eca.dev>

bjo.lock

@@ -1,5 +1,5 @@
 (lock
   (locked
-    (package (name (bjosql)) (version "0.3.0")
+    (package (name (bjosql)) (version "0.3.2")
              (source (git (url "https://github.com/bjoli/bjosql")))
-             (commit "733866e091804ea8a6caa445f5ac191715f78545"))))
+             (commit "61a47982b9054c08dbed3bb96c4ef3dfb6f79d7e"))))