⬆️ Update tested JSON libraries (#260)

* bump the json libraries being used

* bost json dropped the standalone mode in 1.79 boostorg/json@d20a814

Co-authored-by: Dominik Thalhammer <dominik@thalhammer.it>

Author: prince-chrismc

.github/actions/install/boost-json/action.yml

@@ -4,7 +4,7 @@ inputs:
   version:
     description: The desired Boost.JSON version to install
     required: false
-    default: "1.77.0"
+    default: "1.78.0"
 runs:
   using: composite
   steps:

.github/actions/install/danielaparker-jsoncons/action.yml

@@ -4,7 +4,7 @@ inputs:
   version:
     description: The desired jsoncons version to install
     required: false
-    default: "0.167.1"
+    default: "0.168.7"
 runs:
   using: composite
   steps:

.github/actions/install/nlohmann-json/action.yml

@@ -4,7 +4,7 @@ inputs:
   version:
     description: The desired nlohmann-json version to install
     required: false
-    default: "3.10.4"
+    default: "3.11.2"
 runs:
   using: composite
   steps:

.github/workflows/traits.yml

@@ -13,9 +13,9 @@ jobs:
     strategy:
       matrix:
         target:
-          - { name: "danielaparker-jsoncons", tag: "0.167.1", version: "v0.167.1" }
-          - { name: "boost-json", tag: "1.77.0", version: "v1.77.0" }
-          - { name: "nlohmann-json", tag: "3.10.4", version: "v3.10.4" }
+          - { name: "danielaparker-jsoncons", tag: "0.168.7", version: "v0.168.7" }
+          - { name: "boost-json", tag: "1.78.0", version: "v1.80.0" }
+          - { name: "nlohmann-json", tag: "3.11.2", version: "v3.11.2" }
           - { name: "kazuho-picojson", tag: "111c9be5188f7350c2eac9ddaedd8cca3d7bf394", version: "111c9be" }
     steps:
       - uses: actions/checkout@v2