Use a lower joi version for testing earlier node versions

package.json

@@ -36,7 +36,7 @@
     "chai": "^4.1.1",
     "coveralls": "^2.13.1",
     "eslint": "^4.3.0",
-    "joi": ">=10",
+    "joi": "^10.0",
     "mocha": "^3.5.0",
     "nyc": "^11.1.0",
     "prop-factory": "^1.0.0",

yarn.lock

@@ -943,9 +943,9 @@ hoek@2.x.x:
   version "2.16.3"
   resolved "https://registry.yarnpkg.com/hoek/-/hoek-2.16.3.tgz#20bb7403d3cea398e91dc4710a8ff1b8274a25ed"
 
-hoek@5.x.x:
-  version "5.0.3"
-  resolved "https://registry.yarnpkg.com/hoek/-/hoek-5.0.3.tgz#b71d40d943d0a95da01956b547f83c4a5b4a34ac"
+hoek@4.x.x:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/hoek/-/hoek-4.2.1.tgz#9634502aa12c445dd5a7c5734b572bb8738aacbb"
 
 hosted-git-info@^2.1.4:
   version "2.5.0"
@@ -1144,11 +1144,9 @@ isarray@1.0.0, isarray@^1.0.0, isarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
 
-isemail@3.x.x:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/isemail/-/isemail-3.1.2.tgz#937cf919002077999a73ea8b1951d590e84e01dd"
-  dependencies:
-    punycode "2.x.x"
+isemail@2.x.x:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/isemail/-/isemail-2.2.1.tgz#0353d3d9a62951080c262c2aa0a42b8ea8e9e2a6"
 
 isexe@^2.0.0:
   version "2.0.0"
@@ -1211,13 +1209,18 @@ istanbul-reports@^1.1.1:
   dependencies:
     handlebars "^4.0.3"
 
-joi@>=10:
-  version "13.3.0"
-  resolved "https://registry.yarnpkg.com/joi/-/joi-13.3.0.tgz#4defd4333b539c5d10e444ab44f5a5583480f17c"
+items@2.x.x:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/items/-/items-2.1.1.tgz#8bd16d9c83b19529de5aea321acaada78364a198"
+
+joi@^10.0:
+  version "10.6.0"
+  resolved "https://registry.yarnpkg.com/joi/-/joi-10.6.0.tgz#52587f02d52b8b75cdb0c74f0b164a191a0e1fc2"
   dependencies:
-    hoek "5.x.x"
-    isemail "3.x.x"
-    topo "3.x.x"
+    hoek "4.x.x"
+    isemail "2.x.x"
+    items "2.x.x"
+    topo "2.x.x"
 
 js-tokens@^3.0.0, js-tokens@^3.0.2:
   version "3.0.2"
@@ -1786,10 +1789,6 @@ pseudomap@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/pseudomap/-/pseudomap-1.0.2.tgz#f052a28da70e618917ef0a8ac34c1ae5a68286b3"
 
-punycode@2.x.x:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/punycode/-/punycode-2.1.0.tgz#5f863edc89b96db09074bad7947bf09056ca4e7d"
-
 punycode@^1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.4.1.tgz#c0d5a63b2718800ad8e1eb0fa5269c84dd41845e"
@@ -2178,11 +2177,11 @@ to-fast-properties@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-1.0.3.tgz#b83571fa4d8c25b82e231b06e3a3055de4ca1a47"
 
-topo@3.x.x:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/topo/-/topo-3.0.0.tgz#37e48c330efeac784538e0acd3e62ca5e231fe7a"
+topo@2.x.x:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/topo/-/topo-2.0.2.tgz#cd5615752539057c0dc0491a621c3bc6fbe1d182"
   dependencies:
-    hoek "5.x.x"
+    hoek "4.x.x"
 
 tough-cookie@~2.3.0:
   version "2.3.2"