Switch internals to use faster connection

This switches the internals to use faster protocol parsing & serializing.  This results in a significant (30% - 50%) speed up in some common query patterns.  There is quite a bit more performance work I need to do, but this takes care of some initial stuff & removes a big fork in the code.

.travis.yml

@@ -7,20 +7,18 @@ before_script: |
 
 env:
   - CC=clang CXX=clang++ npm_config_clang=1 PGUSER=postgres PGDATABASE=postgres
-  # test w/ new faster parsing code
-  - CC=clang CXX=clang++ npm_config_clang=1 PGUSER=postgres PGDATABASE=postgres PG_FAST_CONNECTION=true
 
 node_js:
   - lts/dubnium
   - lts/erbium
   # node 13.7 seems to have changed behavior of async iterators exiting early on streams
   # if 13.8 still has this problem when it comes down I'll talk to the node team about the change
-  # in the mean time...peg to 13.6 
+  # in the mean time...peg to 13.6
   - 13.6
   - 14
 
 addons:
-  postgresql: "10"
+  postgresql: '10'
 
 matrix:
   include:
@@ -42,25 +40,25 @@ matrix:
 
     - node_js: lts/carbon
       addons:
-        postgresql: "9.5"
+        postgresql: '9.5'
       dist: precise
 
     # different PostgreSQL versions on Node LTS
     - node_js: lts/erbium
       addons:
-        postgresql: "9.3"
+        postgresql: '9.3'
     - node_js: lts/erbium
       addons:
-        postgresql: "9.4"
+        postgresql: '9.4'
     - node_js: lts/erbium
       addons:
-        postgresql: "9.5"
+        postgresql: '9.5'
     - node_js: lts/erbium
       addons:
-        postgresql: "9.6"
+        postgresql: '9.6'
 
     # PostgreSQL 9.2 only works on precise
     - node_js: lts/carbon
       addons:
-        postgresql: "9.2"
+        postgresql: '9.2'
       dist: precise

packages/pg/lib/client.js

@@ -18,9 +18,6 @@ var ConnectionParameters = require('./connection-parameters')
 var Query = require('./query')
 var defaults = require('./defaults')
 var Connection = require('./connection')
-if (process.env.PG_FAST_CONNECTION) {
-  Connection = require('./connection-fast')
-}
 
 var Client = function (config) {
   EventEmitter.call(this)