feat(libs): add utils.merge and utils.concat

libs/utils.lua

@@ -53,6 +53,36 @@ utils.shallowClone = function(t)
   return res
 end
 
+utils.merge = function(a, b)
+  local res = {}
+
+  for k, v in pairs(a) do
+    res[k] = v
+  end
+
+  for k, v in pairs(b) do
+    res[k] = v
+  end
+
+  return res
+end
+
+utils.concat = function(a, b)
+  local res = {}
+  local i = 0
+
+  for _, v in pairs(a) do
+    res[i] = v
+    i = i + 1
+  end
+
+  for _, v in pairs(b) do
+    res[i] = v
+    i = i + 1
+  end
+
+  return res
+end
 
 utils.find = function(t, predicate)
   for k,v in pairs(t) do