fix: Normalize text protocol handling of numeric and numeric[] types

Normalizes handling of numeric[] types to always return a string array
representation of the value for both the text.

Previously numeric array types were being returned as an array of Number
which could lose precision.

Closes #91

Author: sehrope

lib/textParsers.js

@@ -186,7 +186,7 @@ var init = function (register) {
   register(1017, parsePointArray) // point[]
   register(1021, parseFloatArray) // _float4
   register(1022, parseFloatArray) // _float8
-  register(1231, parseFloatArray) // _numeric
+  register(1231, parseStringArray) // _numeric
   register(1014, parseStringArray) // char
   register(1015, parseStringArray) // varchar
   register(1008, parseStringArray)

test/types.js

@@ -289,7 +289,7 @@ exports['array/numeric'] = {
   id: 1231,
   tests: [
     ['{1.2,3.4}', function (t, value) {
-      t.deepEqual(value, [1.2, 3.4])
+      t.deepEqual(value, ['1.2', '3.4'])
     }]
   ]
 }