fix(regex, format): Improve regex boundary matching and remove duplicates (#36)

* tweak(regex):  Improve SM737 boundary matching

* remove(regex): Duplicate patterns created by group tiers

* tweak(group_tiers): Prevent creation of duplicate patterns

* tweak(regex): Use `THREESOME` instead of `threesome`

* tweak(regex): Rename `Colour` to `Colourisation`

* tweak(regex): Improve `Colourisation` description

custom_formats/2160p Quality Tier 6.yml

@@ -25,16 +25,6 @@ conditions:
   pattern: BOREDOR
   required: false
   type: release_group
-- name: threesome
-  negate: false
-  pattern: threesome
-  required: false
-  type: release_group
-- name: Blzt
-  negate: false
-  pattern: Blzt
-  required: false
-  type: release_group
 - name: LittleBakas
   negate: false
   pattern: LittleBakas
@@ -75,11 +65,6 @@ conditions:
   pattern: UHDCLUBREMUX
   required: false
   type: release_group
-- name: invandraren
-  negate: false
-  pattern: invandraren
-  required: false
-  type: release_group
 - name: dkore
   negate: false
   pattern: dkore
@@ -90,4 +75,9 @@ conditions:
   pattern: Lucifer
   required: false
   type: release_group
+- name: THREESOME
+  type: release_group
+  required: false
+  negate: false
+  pattern: THREESOME
 tests: []