Always use tls connector for postgres

Cargo.lock

@@ -1,14 +1,5 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-[[package]]
-name = "aho-corasick"
-version = "0.7.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
@@ -630,12 +621,6 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17b02fc0ff9a9e4b35b3342880f48e896ebf69f2967921fe8646bf5b7125956a"
 
-[[package]]
-name = "once_cell"
-version = "1.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13bd41f508810a131401606d54ac32a467c97172d74ba7662562ebba5ad07fa0"
-
 [[package]]
 name = "opaque-debug"
 version = "0.2.3"
@@ -913,21 +898,18 @@ checksum = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
 
 [[package]]
 name = "regex"
-version = "1.4.3"
+version = "1.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9251239e129e16308e70d853559389de218ac275b515068abc96829d05b948a"
+checksum = "322cf97724bea3ee221b78fe25ac9c46114ebb51747ad5babd51a2fc6a8235a8"
 dependencies = [
- "aho-corasick",
- "memchr",
  "regex-syntax",
- "thread_local",
 ]
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.22"
+version = "0.6.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5eb417147ba9860a96cfe72a0b93bf88fee1744b5636ec99ab20c1aa9376581"
+checksum = "b28dfe3fe9badec5dbf0a79a9cccad2cfc2ab5484bdb3e44cbd1ae8b3ba2be06"
 
 [[package]]
 name = "rustc_version"
@@ -1058,7 +1040,6 @@ dependencies = [
  "postgres-openssl",
  "rand",
  "rayon",
- "regex",
  "state-map",
  "string_cache",
 ]
@@ -1081,15 +1062,6 @@ dependencies = [
  "unicode-width",
 ]
 
-[[package]]
-name = "thread_local"
-version = "1.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8208a331e1cb318dd5bd76951d2b8fc48ca38a69f5f4e4af1b6a9f8c6236915"
-dependencies = [
- "once_cell",
-]
-
 [[package]]
 name = "tokio"
 version = "0.2.11"