use open 7.0.4 to fix issue

better to use this as vi may not be available on windows

.travis.yml

@@ -1,7 +1,5 @@
 language: node_js
 node_js:
-  - "6"
-  - "6.11"
   - "8"
   - "10"
 cache: yarn

package.json

@@ -20,7 +20,7 @@
     "gtt": "src/gtt.js"
   },
   "engines": {
-    "node": ">=6.11"
+    "node": ">=8"
   },
   "pkg": {
     "scripts": "src/**/*.js",
@@ -49,7 +49,7 @@
     "moment": "^2.22.2",
     "moment-timezone": "^0.5.21",
     "node-spinner": "^0.0.4",
-    "open": "^0.0.5",
+    "open": "^7.0.4",
     "progress": "^2.0.0",
     "prompt": "^1.0.0",
     "read-yaml": "^1.1.0",

src/include/filesystem.js

@@ -25,8 +25,12 @@ class filesystem {
     static open(file) {
         let editor = process.env.VISUAL;
 
-        if (!editor && !(editor = process.env.EDITOR)) {
-            editor = "vi";
+        if (editor || (editor = process.env.EDITOR)) {
+            return child_process.spawn(editor, [file], {
+                stdio: 'inherit'
+            });
+        } else {
+            return (async () => await open(file))().catch(e => console.error(e));
         }
 
         return child_process.spawn(editor, [file], {

yarn.lock

@@ -1206,6 +1206,11 @@ is-descriptor@^1.0.0, is-descriptor@^1.0.2:
     is-data-descriptor "^1.0.0"
     kind-of "^6.0.2"
 
+is-docker@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-docker/-/is-docker-2.0.0.tgz#2cb0df0e75e2d064fe1864c37cdeacb7b2dcf25b"
+  integrity sha512-pJEdRugimx4fBMra5z2/5iRdZ63OhYV0vr0Dwm5+xtW4D1FvRkB8hamMIhnWfyJeDdyr/aa7BDyNbtG38VxgoQ==
+
 is-extendable@^0.1.0, is-extendable@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/is-extendable/-/is-extendable-0.1.1.tgz#62b110e289a471418e3ec36a617d472e301dfc89"
@@ -1274,6 +1279,13 @@ is-windows@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.2.tgz#d1850eb9791ecd18e6182ce12a30f396634bb19d"
 
+is-wsl@^2.1.1:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/is-wsl/-/is-wsl-2.2.0.tgz#74a4c76e77ca9fd3f932f290c17ea326cd157271"
+  integrity sha512-fKzAra0rGJUUBwGBgNkHZuToZcn+TtXHpeCgmkMJMMYx1sQDYaCSyjJBSCa2nH1DGm7s3n1oBnohoVTBaN7Lww==
+  dependencies:
+    is-docker "^2.0.0"
+
 [email protected]:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
@@ -1720,9 +1732,13 @@ onetime@^2.0.0:
   dependencies:
     mimic-fn "^1.0.0"
 
-open@^0.0.5:
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/open/-/open-0.0.5.tgz#42c3e18ec95466b6bf0dc42f3a2945c3f0cad8fc"
+open@^7.0.4:
+  version "7.0.4"
+  resolved "https://registry.yarnpkg.com/open/-/open-7.0.4.tgz#c28a9d315e5c98340bf979fdcb2e58664aa10d83"
+  integrity sha512-brSA+/yq+b08Hsr4c8fsEW2CRzk1BmfN3SAK/5VCHQ9bdoZJ4qa/+AfR0xHjlbbZUyPkUHs1b8x1RqdyZdkVqQ==
+  dependencies:
+    is-docker "^2.0.0"
+    is-wsl "^2.1.1"
 
 optimist@^0.6.1:
   version "0.6.1"