Add eslint and styleci files

.eslintignore

@@ -0,0 +1,7 @@
+.travis/*
+.idea/*
+.vscode/*
+node_modules/*
+public/*
+gulpfile.js
+webpack.mix.js

.eslintrc

@@ -0,0 +1,25 @@
+{
+  "extends": "airbnb",
+  "env": {
+    "es6": true,
+    "mocha": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 8
+  },
+  "rules": {
+    "camelcase": 0,
+    "no-param-reassign": [
+      2,
+      {
+        "props": false
+      }
+    ],
+    "import/no-extraneous-dependencies": [
+      "error",
+      {
+        "devDependencies": true
+      }
+    ]
+  }
+}

.styleci.yml

@@ -0,0 +1,31 @@
+preset: recommended
+risky: true
+enabled:
+  - align_double_arrow_minimal
+  # - align_equals_minimal
+  # - date_time_immutable
+  - ereg_to_preg
+  - function_to_constant
+  # - mb_str_functions
+  - modernize_types_casting
+  # - native_function_invocation
+  - no_blank_lines_after_return
+  - no_homoglyph_names
+  - no_php4_constructor
+  - no_useless_else
+  - phpdoc_add_missing_param_annotation
+disabled:
+  - align_double_arrow
+  - blank_line_before_return
+  # - hash_to_slash_comment
+  - phpdoc_summary
+  - phpdoc_var_without_name
+  # - unalign_equals
+finder:
+  exclude:
+  - modules
+  - node_modules
+  - storage
+  - vendor
+  name: "*.php"
+  not-name: "*.blade.php"

.travis/deploy_script.sh

@@ -54,10 +54,13 @@ if [ "$TRAVIS" = "true" ]; then
         .sass-cache
         .idea
         .travis
-        .dpl
-        .phpstorm.meta.php
-        _ide_helper.php
         tests
+        _ide_helper.php
+        .dpl
+        .eslintignore
+        .eslintrc
+        .phpstorm.meta.php
+        .styleci.yml
         env.php
         config.php
         Makefile