Remove connection dependency (#506)

Author: greg-rychlewski

mix.lock

@@ -1,7 +1,6 @@
 %{
   "benchee": {:hex, :benchee, "0.11.0", "cf96e328ff5d69838dd89c21a9db22716bfcc6ef772e9d9dddf7ba622102722d", [:mix], [{:deep_merge, "~> 0.1", [hex: :deep_merge, repo: "hexpm", optional: false]}], "hexpm", "c345e090e0a61bf33e0385aa3ad394fcb7d863e313bc3fca522e390c7f39166e"},
   "benchee_json": {:hex, :benchee_json, "0.4.0", "59d3277829bd1dca8373cdb20b916cb435c2647be235d09963fc0959db908c36", [:mix], [{:benchee, "~> 0.10", [hex: :benchee, repo: "hexpm", optional: false]}, {:poison, ">= 1.4.0", [hex: :poison, repo: "hexpm", optional: false]}], "hexpm", "71a3edb6a30708de2a01368aa8f288e1c0ed7897b125adc396ce7c2c7245b1e7"},
-  "connection": {:hex, :connection, "1.1.0", "ff2a49c4b75b6fb3e674bfc5536451607270aac754ffd1bdfe175abe4a6d7a68", [:mix], [], "hexpm", "722c1eb0a418fbe91ba7bd59a47e28008a189d47e37e0e7bb85585a016b2869c"},
   "db_connection": {:hex, :db_connection, "2.5.0", "bb6d4f30d35ded97b29fe80d8bd6f928a1912ca1ff110831edcd238a1973652c", [:mix], [{:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "c92d5ba26cd69ead1ff7582dbb860adeedfff39774105a4f1c92cbb654b55aa2"},
   "decimal": {:hex, :decimal, "2.0.0", "a78296e617b0f5dd4c6caf57c714431347912ffb1d0842e998e9792b5642d697", [:mix], [], "hexpm", "34666e9c55dea81013e77d9d87370fe6cb6291d1ef32f46a1600230b1d44f577"},
   "deep_merge": {:hex, :deep_merge, "0.2.0", "c1050fa2edf4848b9f556fba1b75afc66608a4219659e3311d9c9427b5b680b3", [:mix], [], "hexpm", "e3bf435a54ed27b0ba3a01eb117ae017988804e136edcbe8a6a14c310daa966e"},