fix(street_suffix): remove "ga" as a street suffix (#122)

* remove "ga" as a street suffix

this suffix is breaking us queries like "jasper ga"

Wikipedia says "Streets diverging from -gil are named after -gil with the diverging -gil with the additional number in Korean alphabet: ga (가), na (나), da (다), ra (라), ma (마) ... For example, the third diverging street of Daehak-ro 4-gil (대학로4길) would be Daehak-ro 4da-gil (대학로4다길). This secondary diverging numbering is applied to all of the numbering rules. "

But we can't parse the string "Daehak-ro 4da-gil" (or ".. 4ga-gil") so it seems like for now it's better to blacklist this common abbreviation

* add test for jasper ga

Author: blackmad

resources/pelias/dictionaries/libpostal/ko/street_types.txt

@@ -0,0 +1 @@
+!ga

test/functional.test.js

@@ -88,6 +88,9 @@ const testcase = (test, common) => {
   assert('new south wales aus', [
     { region: 'new south wales' }, { country: 'aus' }
   ])
+
+  // test that we don't interpret "ga" as a street suffix
+  assert('jasper ga', [{ locality: 'jasper' }, { region: 'ga' }])
 }
 
 module.exports.all = (tape, common) => {