Bump rubocop to 0.82 (rails#38980)

* Bump rubocop to 0.82

The `Layout/Tab` cop has been renamed to `Layout/IndentationStyle`
ref: https://github.com/rubocop-hq/rubocop/releases/tag/v0.82.0

No other code changes required.

* Bump rubocop-rails to 2.5.2

No code-changes required.

[Tejas Bubane + Rafael Mendonça França]

Author: tejasbubane

.rubocop.yml

@@ -167,7 +167,7 @@ Style/StringLiterals:
   EnforcedStyle: double_quotes
 
 # Detect hard tabs, no hard tabs.
-Layout/Tab:
+Layout/IndentationStyle:
   Enabled: true
 
 # Empty lines should not have any spaces.

Gemfile.lock

@@ -347,7 +347,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     os (1.0.1)
     parallel (1.19.1)
-    parser (2.7.0.2)
+    parser (2.7.1.1)
       ast (~> 2.4.0)
     path_expander (1.1.0)
     pg (1.2.3)
@@ -406,18 +406,19 @@ GEM
       resque (>= 1.26)
       rufus-scheduler (~> 3.2)
     retriable (3.1.2)
-    rexml (3.2.3)
-    rubocop (0.80.0)
+    rexml (3.2.4)
+    rubocop (0.82.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
       rexml
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 1.7)
+      unicode-display_width (>= 1.4.0, < 2.0)
     rubocop-performance (1.5.2)
       rubocop (>= 0.71.0)
-    rubocop-rails (2.4.1)
+    rubocop-rails (2.5.2)
+      activesupport
       rack (>= 1.1)
       rubocop (>= 0.72.0)
     ruby-progressbar (1.10.1)
@@ -500,7 +501,7 @@ GEM
     uber (0.1.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    unicode-display_width (1.6.1)
+    unicode-display_width (1.7.0)
     useragent (0.16.10)
     vegas (0.1.11)
       rack (>= 1.0.0)