Mentioned that tuples are now correctly serializable.

README.md

@@ -41,7 +41,7 @@ Paguro is short for the Latin "Paguroidea" - the name of the Hermit Crab superfa
   * `set(3, 5, 7)` - an immutable set of three integers
   * `tup("Alice", 11, 3.14)` - an immutable 3-field tuple or record
   * `map(tup(1, "single"), tup(2, "double"), tup(3, "triple"))` - an immutable map that uses integers to look up appropriate strings.
-* **Extensible, immutable tuples** [api](https://javadoc.io/doc/org.organicdesign/Paguro/latest/org/organicdesign/fp/tuple/package-summary.html) / [src](src/main/java/org/organicdesign/fp/tuple) - use them for rapid, yet type-safe prototyping, then later extend them to make your own lightweight, immutable Java classes with correct `equals()`, `hashCode()`, and `toString()` implementations.
+* **Extensible, immutable tuples** [api](https://javadoc.io/doc/org.organicdesign/Paguro/latest/org/organicdesign/fp/tuple/package-summary.html) / [src](src/main/java/org/organicdesign/fp/tuple) - use them for rapid, yet type-safe prototyping, then later extend them to make your own lightweight, immutable, serializable Java classes with correct `equals()`, `hashCode()`, and `toString()` implementations.
 * **Lazy initialization** [api](https://javadoc.io/doc/org.organicdesign/Paguro/latest/org/organicdesign/fp/function/LazyRef.html) / [src](src/main/java/org/organicdesign/fp/function/LazyRef.java) - LazyRef thread-safely performs initialization and frees initialization resources on first use.  Subsequent uses get the now-constant initialized value.  Use this instead of static initializers to avoid initialization loops.  Cache results of expensive operations for reuse.
 * **Union types** [api](https://javadoc.io/doc/org.organicdesign/Paguro/latest/org/organicdesign/fp/oneOf/package-summary.html) / [test](src/test/java/org/organicdesign/fp/oneOf/OneOf2Test.java) - Not as nice as being built into the language, but they extend type safety outside the object hierarchy.
 * **Memoization** [api](https://javadoc.io/doc/org.organicdesign/Paguro/latest/org/organicdesign/fp/function/Fn3.html) / [src](src/main/java/org/organicdesign/fp/function/Fn3.java) - Turns function calls into hashtable lookups to speed up slow functions over a limited range of inputs.