add json module

fc728450 · Rye Mutt · fc728450 · a015b78e
Commit fc728450 authored Aug 09, 2019 by Rye Mutt 🍞
--- a/.gitmodules
+++ b/.gitmodules
+[submodule "json"]
+	path = json
+	url = https://github.com/nlohmann/json.git
+	branch = release/3.7.0
--- a/json @ a015b78e
+++ b/json @ a015b78e
+Subproject commit a015b78e81c859b88840cb0cd4001ce1fe5e7865