meson: adjust nlohmann-json dependency

Simplify the meson dependency for nlohmann-json, use the consistent
dependency name, and align the wrap file name with other repositories.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I3a682a3e07e38d0a1bfe35858e24f1bb74b4ec34
diff --git a/fw-update/test/meson.build b/fw-update/test/meson.build
index a3fec9c..ce47e57 100644
--- a/fw-update/test/meson.build
+++ b/fw-update/test/meson.build
@@ -25,7 +25,7 @@
                          gtest,
                          libpldm_dep,
                          libpldmutils,
-                         nlohmann_json,
+                         nlohmann_json_dep,
                          phosphor_dbus_interfaces,
                          phosphor_logging_dep,
                          sdbusplus,