Use commit version for https://bugs.ruby-lang.org/issues/16495

* https://github.com/ruby/drb/pull/25
* https://github.com/minitest/minitest/pull/987
* https://github.com/test-unit/test-unit/pull/237
* https://github.com/ruby/bigdecimal/pull/286

gems/bundled_gems

@@ -5,10 +5,10 @@
 # - repository-url: URL from where clone for test
 # - revision: revision in repository-url to test
 #   if `revision` is not given, "v"+`version` or `version` will be used.
-minitest        5.22.2  https://github.com/minitest/minitest
+minitest        5.22.2  https://github.com/minitest/minitest 00affdbf08f42b9b12df043e9fe28e56ad33b622
 power_assert    2.0.3   https://github.com/ruby/power_assert
 rake            13.1.0  https://github.com/ruby/rake
-test-unit       3.6.1   https://github.com/test-unit/test-unit
+test-unit       3.6.2   https://github.com/test-unit/test-unit
 rexml           3.2.6   https://github.com/ruby/rexml
 rss             0.3.0   https://github.com/ruby/rss
 net-ftp         0.3.4   https://github.com/ruby/net-ftp
@@ -24,12 +24,12 @@ racc            1.7.3   https://github.com/ruby/racc
 mutex_m         0.2.0   https://github.com/ruby/mutex_m
 getoptlong      0.2.1   https://github.com/ruby/getoptlong
 base64          0.2.0   https://github.com/ruby/base64
-bigdecimal      3.1.6   https://github.com/ruby/bigdecimal
+bigdecimal      3.1.6   https://github.com/ruby/bigdecimal 741fb93b566959663269ecd988e278a974528a1d
 observer        0.1.2   https://github.com/ruby/observer
 abbrev          0.1.2   https://github.com/ruby/abbrev
 resolv-replace  0.1.1   https://github.com/ruby/resolv-replace
 rinda           0.2.0   https://github.com/ruby/rinda
-drb             2.2.0   https://github.com/ruby/drb
+drb             2.2.0   https://github.com/ruby/drb 29389313b6f0d1b215ba16cdc28062dbc44c3c50
 nkf             0.2.0   https://github.com/ruby/nkf
 syslog          0.1.2   https://github.com/ruby/syslog
 csv             3.2.8   https://github.com/ruby/csv