fix: fix singularizing databases not using correct word

fixes #91

Author: p-kuen

lib/inflection.js

@@ -352,6 +352,7 @@
       children  : new RegExp( '(child)ren$'                    , 'gi' ),
       tia       : new RegExp( '([ti])a$'                       , 'gi' ),
       analyses  : new RegExp( '((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$','gi' ),
+      databases : new RegExp( '(database)s$'                   , 'gi' ),
       drives    : new RegExp( '(drive)s$'                      , 'gi' ),
       hives     : new RegExp( '(hi|ti)ves$'                    , 'gi' ),
       curves    : new RegExp( '(curve)s$'                      , 'gi' ),
@@ -425,6 +426,7 @@
     [ regex.plural.children  ],
     [ regex.plural.tia       ],
     [ regex.plural.analyses  ],
+    [ regex.plural.databases ],
     [ regex.plural.drives    ],
     [ regex.plural.hives     ],
     [ regex.plural.curves    ],
@@ -523,6 +525,7 @@
     [ regex.plural.men      , '$1an' ],
     [ regex.plural.people   , '$1rson' ],
     [ regex.plural.children , '$1' ],
+    [ regex.plural.databases, '$1'],
     [ regex.plural.drives   , '$1'],
     [ regex.plural.genera   , 'genus'],
     [ regex.plural.criteria , '$1on'],

test/inflection.test.js

@@ -58,6 +58,7 @@ describe("test .pluralize", function () {
     expect(inflection.pluralize("bonus")).toEqual("bonuses");
     expect(inflection.pluralize("grammar")).toEqual("grammars");
     expect(inflection.pluralize("drive")).toEqual("drives");
+    expect(inflection.pluralize("database")).toEqual("databases");
   });
 });
 
@@ -107,6 +108,7 @@ describe("test .singularize", function () {
     expect(inflection.singularize("bonuses")).toEqual("bonus");
     expect(inflection.singularize("grammars")).toEqual("grammar");
     expect(inflection.singularize("drives")).toEqual("drive");
+    expect(inflection.singularize("databases")).toEqual("database");
   });
 });