Switch to bigdecimal gem

The bigdecimal gem now releases a -java version that contains only
the .rb files we also use. As a result, we can now depend on it
and remove the Ruby sources from our repository.

See ruby/bigdecimal#169

.gitignore

@@ -60,6 +60,7 @@ lib/ruby/stdlib/abbrev*
 lib/ruby/stdlib/ant*
 lib/ruby/stdlib/base64*
 lib/ruby/stdlib/benchmark*
+lib/ruby/stdlib/bigdecimal*
 lib/ruby/stdlib/bundler*
 lib/ruby/stdlib/cgi*
 lib/ruby/stdlib/csv*

lib/pom.rb

@@ -21,8 +21,7 @@ def log(message=nil)
     ['abbrev', '0.1.0'],
     ['base64', '0.1.1'],
     ['benchmark', '0.2.0'],
-    # https://github.com/ruby/bigdecimal/issues/169
-    # ['bigdecimal', '3.1.1'],
+    ['bigdecimal', '3.1.4'],
     ['bundler', '2.3.26'],
     ['cgi', '0.3.6'],
     ['csv', '3.2.5'],

lib/pom.xml

@@ -83,6 +83,19 @@ DO NOT MODIFY - GENERATED CODE
         </exclusion>
       </exclusions>
     </dependency>
+    <dependency>
+      <groupId>rubygems</groupId>
+      <artifactId>bigdecimal</artifactId>
+      <version>3.1.4</version>
+      <type>gem</type>
+      <scope>provided</scope>
+      <exclusions>
+        <exclusion>
+          <groupId>rubygems</groupId>
+          <artifactId>jar-dependencies</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
     <dependency>
       <groupId>rubygems</groupId>
       <artifactId>bundler</artifactId>
@@ -1057,6 +1070,7 @@ DO NOT MODIFY - GENERATED CODE
           <include>specifications/abbrev-0.1.0*</include>
           <include>specifications/base64-0.1.1*</include>
           <include>specifications/benchmark-0.2.0*</include>
+          <include>specifications/bigdecimal-3.1.4*</include>
           <include>specifications/bundler-2.3.26*</include>
           <include>specifications/cgi-0.3.6*</include>
           <include>specifications/csv-3.2.5*</include>
@@ -1134,6 +1148,7 @@ DO NOT MODIFY - GENERATED CODE
           <include>gems/abbrev-0.1.0*/**/*</include>
           <include>gems/base64-0.1.1*/**/*</include>
           <include>gems/benchmark-0.2.0*/**/*</include>
+          <include>gems/bigdecimal-3.1.4*/**/*</include>
           <include>gems/bundler-2.3.26*/**/*</include>
           <include>gems/cgi-0.3.6*/**/*</include>
           <include>gems/csv-3.2.5*/**/*</include>
@@ -1211,6 +1226,7 @@ DO NOT MODIFY - GENERATED CODE
           <include>cache/abbrev-0.1.0*</include>
           <include>cache/base64-0.1.1*</include>
           <include>cache/benchmark-0.2.0*</include>
+          <include>cache/bigdecimal-3.1.4*</include>
           <include>cache/bundler-2.3.26*</include>
           <include>cache/cgi-0.3.6*</include>
           <include>cache/csv-3.2.5*</include>