Bump minimum supported to 1.0.15 for sanity.

.travis.yml

@@ -17,7 +17,7 @@ before_install:
 - sudo apt-get install make build-essential automake
 - git clone git://github.com/jedisct1/libsodium.git
 - cd libsodium
-- git checkout 1.0.13
+- git checkout 1.0.15
 - ./autogen.sh
 - ./configure && make check
 - sudo make install

README.md

@@ -31,11 +31,12 @@ Before you can use Halite, you must choose a version that fits the requirements
 of your project. The differences between the requirements for the available 
 versions of Halite are briefly highlighted below.
 
-|                                                            | PHP   | libsodium | PECL libsodium |
-|------------------------------------------------------------|-------|-----------|----------------|
-| Halite 4                                                   | 7.2.0 | 1.0.13    | N/A (standard) |
-| [Halite 3](https://github.com/paragonie/halite/tree/v3.x)  | 7.0.0 | 1.0.9     | 1.0.6 / 2.0.4  |
-| [Halite 2](https://github.com/paragonie/halite/tree/v2.2)  | 7.0.0 | 1.0.9     | 1.0.6          |
+|                                                             | PHP   | libsodium | PECL libsodium |
+|-------------------------------------------------------------|-------|-----------|----------------|
+| Halite 4.1 and newer                                        | 7.2.0 | 1.0.15    | N/A (standard) |
+| [Halite 4.0](https://github.com/paragonie/halite/tree/v4.0) | 7.2.0 | 1.0.13    | N/A (standard) |
+| [Halite 3](https://github.com/paragonie/halite/tree/v3.x)   | 7.0.0 | 1.0.9     | 1.0.6 / 2.0.4  |
+| [Halite 2](https://github.com/paragonie/halite/tree/v2.2)   | 7.0.0 | 1.0.9     | 1.0.6          |
 
 If you need a version of Halite before 4.0, see the documentation relevant to that
 particular branch.

src/Halite.php

@@ -36,7 +36,7 @@
  */
 final class Halite
 {
-    const VERSION              = '4.0.0';
+    const VERSION              = '4.1.0';
 
     const HALITE_VERSION_KEYS  = "\x31\x40\x04\x00";
     const HALITE_VERSION_FILE  = "\x31\x41\x04\x00";
@@ -148,10 +148,9 @@ public static function isLibsodiumSetupCorrectly(bool $echo = false): bool
 
         // Require libsodium 1.0.13
         $major = \SODIUM_LIBRARY_MAJOR_VERSION;
-        $minor = \SODIUM_LIBRARY_MINOR_VERSION;
-        if ($major < 9 || ($major === 9 && $minor < 5)) {
+        if ($major < 10) {
             if ($echo) {
-                echo 'Halite needs libsodium 1.0.13 or higher. You have: ',
+                echo 'Halite needs libsodium 1.0.15 or higher. You have: ',
                 \SODIUM_LIBRARY_VERSION, "\n";
             }
             return false;