docs: add pilerou as a contributor (#497)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -419,6 +419,17 @@
         "code",
         "test"
       ]
+    },
+    {
+      "login": "pilerou",
+      "name": "Pierre Le Roux",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/664865?v=4",
+      "profile": "https://github.com/pilerou",
+      "contributions": [
+        "code",
+        "test",
+        "ideas"
+      ]
     }
   ],
   "contributorsPerLine": 7,