meson: adjust nlohmann-json dependency

Simplify the nlohmann-json in the meson.build and align with the usage
in other repositories.

Change-Id: I8daf46711bdfcec30bb38a32324046f6b717aa33
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/subprojects/nlohmann.wrap b/subprojects/nlohmann.wrap
deleted file mode 100644
index a77b7c9..0000000
--- a/subprojects/nlohmann.wrap
+++ /dev/null
@@ -1,3 +0,0 @@
-[wrap-git]
-revision = b3e5cb7f20dcc5c806e418df34324eca60d17d4e
-url = https://github.com/nlohmann/json.git
diff --git a/subprojects/nlohmann_json.wrap b/subprojects/nlohmann_json.wrap
new file mode 100644
index 0000000..3745380
--- /dev/null
+++ b/subprojects/nlohmann_json.wrap
@@ -0,0 +1,6 @@
+[wrap-git]
+revision = HEAD
+url = https://github.com/nlohmann/json.git
+
+[provide]
+nlohmann_json = nlohmann_json_dep