update libxml-ruby to latest version

and as a side effect updated the simple-spreadsheet-extractor gem

Gemfile

@@ -12,10 +12,10 @@ gem 'sqlite3', '~> 1.4'
 gem 'feedjira'
 gem 'google-analytics-rails'
 gem 'hpricot', '~>0.8.2'
-gem 'libxml-ruby', '~>2.9.0', require: 'libxml'
+gem 'libxml-ruby', '~>5.0', require: 'libxml'
 gem 'uuid', '~>2.3'
 gem 'RedCloth', '>=4.3.0'
-gem 'simple-spreadsheet-extractor', '0.18.1'
+gem 'simple-spreadsheet-extractor', '0.18.2'
 gem 'open4'
 gem 'sample-template-generator', '~>0.7'
 gem 'rmagick', '5.3.0'

Gemfile.lock

@@ -401,7 +401,7 @@ GEM
       sparql (~> 3.2)
       sxp (~> 1.2)
     libreconv (0.9.5)
-    libxml-ruby (2.9.0)
+    libxml-ruby (5.0.3)
     licensee (9.16.0)
       dotenv (~> 2.0)
       octokit (>= 4.20, < 7.0)
@@ -863,8 +863,8 @@ GEM
       rdf-xsd (~> 3.2)
       sparql (~> 3.2)
       sxp (~> 1.2)
-    simple-spreadsheet-extractor (0.18.1)
-      libxml-ruby (~> 2.9)
+    simple-spreadsheet-extractor (0.18.2)
+      libxml-ruby (~> 5.0)
       terrapin (~> 1.0)
     simplecov (0.21.2)
       docile (~> 1.1)
@@ -1054,7 +1054,7 @@ DEPENDENCIES
   jquery-ui-rails
   json-schema
   libreconv
-  libxml-ruby (~> 2.9.0)
+  libxml-ruby (~> 5.0)
   licensee
   linkeddata (~> 3.2.0)
   listen (~> 3.3)
@@ -1121,7 +1121,7 @@ DEPENDENCIES
   sass-rails (>= 6)
   savon (= 1.1.0)
   seedbank
-  simple-spreadsheet-extractor (= 0.18.1)
+  simple-spreadsheet-extractor (= 0.18.2)
   simplecov
   sitemap_generator (~> 6.3)
   sprockets-rails