added tests, fixed issues with overriding/format

In the documentation it states that child values can override the parent
values. Originally this code did not support that but now it does. Also
added in testing inspired by the previous tests.

Signed-off-by: cullvox <cullvox@outlook.com>

tests/testdata/MetaComponentParse/component_basic.json

@@ -0,0 +1,4 @@
+{
+  "description": [{"text": "Hello, Component!"}],
+  "expected_output": "Hello, Component!"
+}