Upgrade dependencies (#416)

* chore: upgrade dependencies

* chore: enable Node 12 on AppVeyor

* chore: trust windows on travis

.flowconfig

@@ -20,4 +20,4 @@ untyped-import
 untyped-type-import
 
 [version]
-^0.92.1
+^0.105.2

.travis.yml

@@ -9,14 +9,11 @@ os:
 node_js:
   - "8"
   - "10"
-  - "11"
   - "12"
 
 cache: npm
 
 matrix:
   fast_finish: true
-  allow_failures:
-    - os: windows
 
 after_success: if [[ "$TRAVIS_OS_NAME" != 'windows' ]]; then npm run flow; fi

README.md

@@ -200,7 +200,7 @@ If you want to override `process.env` you can do something like this:
 const fs = require('fs')
 const dotenv = require('dotenv')
 const envConfig = dotenv.parse(fs.readFileSync('.env.override'))
-for (let k in envConfig) {
+for (const k in envConfig) {
   process.env[k] = envConfig[k]
 }
 ```

appveyor.yml

@@ -5,6 +5,7 @@ environment:
   matrix:
     - nodejs_version: "8"
     - nodejs_version: "10"
+    - nodejs_version: "12"
 
 # Install scripts. (runs after repo cloning)
 install:

lib/main.js

@@ -96,7 +96,7 @@ function config (options /*: ?DotenvConfigOptions */) /*: DotenvConfigOutput */
     const parsed = parse(fs.readFileSync(dotenvPath, { encoding }), { debug })
 
     Object.keys(parsed).forEach(function (key) {
-      if (!process.env.hasOwnProperty(key)) {
+      if (!Object.prototype.hasOwnProperty.call(process.env, key)) {
         process.env[key] = parsed[key]
       } else if (debug) {
         log(`"${key}" is already defined in \`process.env\` and will not be overwritten`)