Lint SVG files for final newlines (#1367)

* Update editorconfig-checker dependency

At least v2.0.7 [1] is required to check that a file does not contain a 
final newline.

--
1. 
https://github.com/editorconfig-checker/editorconfig-checker.javascript/releases/tag/2.0.7

* Add *.svg to editorconfig and enable checking in editorconfig-checker

* Remove final newline from existing SVG files

... to fix the `$ npm run wslint` command

.editorconfig

@@ -12,6 +12,9 @@ indent_style=space
 indent_size=2
 indent_style=space
 
+[*.svg]
+insert_final_newline=false
+
 [.github/**/*.md]
 trim_trailing_whitespace=false # Templates with trailing whitespace are more usable
 

package-lock.json

@@ -1194,9 +1194,9 @@
       }
     },
     "editorconfig-checker": {
-      "version": "2.0.6",
-      "resolved": "https://registry.npmjs.org/editorconfig-checker/-/editorconfig-checker-2.0.6.tgz",
-      "integrity": "sha512-/p3egFALNsTSt0YM7gOAGxhIVTX/GHUwwlPKixykpyMbBh5+Hebg0OaxVu3UdPoGttHM2ajPFJfqSIxUL+ytbg==",
+      "version": "2.0.8",
+      "resolved": "https://registry.npmjs.org/editorconfig-checker/-/editorconfig-checker-2.0.8.tgz",
+      "integrity": "sha512-3uj37kvyI9WeiprooUsNg+UkmymqgpIpN4ExYajT+Lhe4z16Q82xYXSPNbD1bFN+hkj+2cZkghsiHlPGRXgA4g==",
       "dev": true,
       "requires": {
         "request": "^2.88.0",

package.json

@@ -18,7 +18,7 @@
   "author": "Simple Icons Collaborators",
   "license": "CC0-1.0",
   "devDependencies": {
-    "editorconfig-checker": "^2.0.6",
+    "editorconfig-checker": "^2.0.8",
     "jest": "^24.1.0",
     "jsonlint2": "^1.7.1",
     "svglint": "^1.0.4"
@@ -26,7 +26,7 @@
   "scripts": {
     "jsonlint": "jsonlint _data/simple-icons.json -q -V .jsonlintschema",
     "svglint": "svglint icons/* --ci",
-    "wslint": "editorconfig-checker",
+    "wslint": "editorconfig-checker --ignore",
     "prepublishOnly": "node scripts/prepublish.js",
     "postpublish": "rm icons/*.js index.js",
     "test": "jest",