fix: quater milimeters not detected (shellscape#81)

* fix: quater milimeters not detected

* test: added quatermilimeter test and updated snapshots

Author: AndyOGo

lib/nodes/Numeric.js

@@ -14,7 +14,7 @@ const { registerWalker } = require('../walker');
 
 const Node = require('./Node');
 
-const unitRegex = /%|ch|cm|em|ex|in|mm|pc|pt|px|rem|vh|vmax|vmin|vw$/i;
+const unitRegex = /%|ch|cm|em|ex|in|mm|pc|pt|px|q|rem|vh|vmax|vmin|vw$/i;
 
 class Numeric extends Node {
   constructor(options = {}) {

test/fixtures/numeric.js

@@ -22,6 +22,7 @@ module.exports = {
     '-2px',
     '-16px',
     '-16px -1px -1px -16px',
+    '10q',
     '1e10',
     '1E10',
     '1e-10',

test/snapshots/numeric.test.js.md

@@ -69,7 +69,7 @@ Generated by [AVA](https://ava.li).
           input: Input {
             css: '-.567800E-0012780em',
             hasBOM: false,
-            id: '<input css 19>',
+            id: '<input css 20>',
           },
           start: {
             column: 1,
@@ -375,7 +375,7 @@ Generated by [AVA](https://ava.li).
           input: Input {
             css: '.1E+10',
             hasBOM: false,
-            id: '<input css 21>',
+            id: '<input css 22>',
           },
           start: {
             column: 1,
@@ -414,7 +414,7 @@ Generated by [AVA](https://ava.li).
           input: Input {
             css: '.1E-10',
             hasBOM: false,
-            id: '<input css 20>',
+            id: '<input css 21>',
           },
           start: {
             column: 1,
@@ -505,6 +505,45 @@ Generated by [AVA](https://ava.li).
       },
     ]
 
+## 10q
+
+> Snapshot 1
+
+    '10q'
+
+> Snapshot 2
+
+    '10q'
+
+> Snapshot 3
+
+    [
+      Numeric {
+        raws: {
+          after: '',
+          before: '',
+        },
+        source: {
+          end: {
+            column: 1,
+            line: 1,
+          },
+          input: Input {
+            css: '10q',
+            hasBOM: false,
+            id: '<input css 13>',
+          },
+          start: {
+            column: 1,
+            line: 1,
+          },
+        },
+        type: 'numeric',
+        unit: 'q',
+        value: '10',
+      },
+    ]
+
 ## 1E+10
 
 > Snapshot 1
@@ -531,7 +570,7 @@ Generated by [AVA](https://ava.li).
           input: Input {
             css: '1E+10',
             hasBOM: false,
-            id: '<input css 18>',
+            id: '<input css 19>',
           },
           start: {
             column: 1,
@@ -570,7 +609,7 @@ Generated by [AVA](https://ava.li).
           input: Input {
             css: '1E-10',
             hasBOM: false,
-            id: '<input css 16>',
+            id: '<input css 17>',
           },
           start: {
             column: 1,
@@ -609,7 +648,7 @@ Generated by [AVA](https://ava.li).
           input: Input {
             css: '1E10',
             hasBOM: false,
-            id: '<input css 14>',
+            id: '<input css 15>',
           },
           start: {
             column: 1,
@@ -648,7 +687,7 @@ Generated by [AVA](https://ava.li).
           input: Input {
             css: '1e+10',
             hasBOM: false,
-            id: '<input css 17>',
+            id: '<input css 18>',
           },
           start: {
             column: 1,
@@ -687,7 +726,7 @@ Generated by [AVA](https://ava.li).
           input: Input {
             css: '1e-10',
             hasBOM: false,
-            id: '<input css 15>',
+            id: '<input css 16>',
           },
           start: {
             column: 1,
@@ -726,7 +765,7 @@ Generated by [AVA](https://ava.li).
           input: Input {
             css: '1e10',
             hasBOM: false,
-            id: '<input css 13>',
+            id: '<input css 14>',
           },
           start: {
             column: 1,