update readme

Author: vonovak

README.md

@@ -37,7 +37,7 @@ static navigationOptions = {
 | IconComponent?: React.ComponentType<\*> | component to use for the icons                               |                                                                   |
 | iconSize?: number                       | iconSize                                                     |                                                                   |
 | color?: string                          | color of icons and buttons                                   |                                                                   |
-| OverflowIcon?: React.ComponentType<\*>  | React element for the overflow icon                          | will render android-styled overflow icon by default               |
+| OverflowIcon?: React.ComponentType<\*>  | React element for the overflow icon                          | you need to provide this only if you need overflow icon           |
 | overflowButtonWrapperStyle?: Object     | optional styles for overflow button                          | there are some default styles set, as seen in `OverflowButton.js` |
 | cancelButtonLabel?: string              | ios only, the cancel button label for overflow menu actions  | 'Cancel' by default                                               |
 

example/navbar-buttons-demo/yarn.lock

@@ -1798,11 +1798,11 @@ fs.realpath@^1.0.0:
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
 
 fsevents@^1.2.3:
-  version "1.2.3"
-  resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-1.2.3.tgz#08292982e7059f6674c93d8b829c1e8604979ac0"
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-1.2.4.tgz#f41dcb1af2582af3692da36fc55cbd8e1041c426"
   dependencies:
     nan "^2.9.2"
-    node-pre-gyp "^0.9.0"
+    node-pre-gyp "^0.10.0"
 
 gauge@~1.2.5:
   version "1.2.7"
@@ -2795,9 +2795,9 @@ node-notifier@^5.1.2:
     shellwords "^0.1.1"
     which "^1.3.0"
 
-node-pre-gyp@^0.9.0:
-  version "0.9.1"
-  resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.9.1.tgz#f11c07516dd92f87199dbc7e1838eab7cd56c9e0"
+node-pre-gyp@^0.10.0:
+  version "0.10.0"
+  resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.10.0.tgz#6e4ef5bb5c5203c6552448828c852c40111aac46"
   dependencies:
     detect-libc "^1.0.2"
     mkdirp "^0.5.1"
@@ -3337,16 +3337,10 @@ react-native-vector-icons@4.5.0:
     xmldoc "^0.4.0"
     yargs "^9.0.0"
 
-react-navigation-header-buttons-base@^0.0.2:
-  version "0.0.2"
-  resolved "https://registry.yarnpkg.com/react-navigation-header-buttons-base/-/react-navigation-header-buttons-base-0.0.2.tgz#270e6cfeb5c5a85f1f886ed213638f35f058c8c3"
-  dependencies:
-    react-native-platform-touchable "^1.1.1"
-
 "react-navigation-header-buttons@file:../..":
-  version "0.0.7"
+  version "0.0.8"
   dependencies:
-    react-navigation-header-buttons-base "^0.0.2"
+    react-native-platform-touchable "^1.1.1"
 
 react-navigation@^1.0.0-beta.27:
   version "1.5.12"
@@ -3425,8 +3419,8 @@ readable-stream@~1.1.8, readable-stream@~1.1.9:
     string_decoder "~0.10.x"
 
 regenerate@^1.2.1:
-  version "1.3.3"
-  resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.3.3.tgz#0c336d3980553d755c39b586ae3b20aa49c82b7f"
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.4.0.tgz#4a856ec4b56e4077c557589cae85e7a4c8869a11"
 
 regenerator-runtime@^0.11.0:
   version "0.11.1"
@@ -3490,8 +3484,8 @@ repeating@^2.0.0:
     is-finite "^1.0.0"
 
 request@^2.79.0:
-  version "2.85.0"
-  resolved "https://registry.yarnpkg.com/request/-/request-2.85.0.tgz#5a03615a47c61420b3eb99b7dba204f83603e1fa"
+  version "2.86.0"
+  resolved "https://registry.yarnpkg.com/request/-/request-2.86.0.tgz#2b9497f449b0a32654c081a5cf426bbfb5bf5b69"
   dependencies:
     aws-sign2 "~0.7.0"
     aws4 "^1.6.0"
@@ -3511,7 +3505,6 @@ request@^2.79.0:
     performance-now "^2.1.0"
     qs "~6.5.1"
     safe-buffer "^5.1.1"
-    stringstream "~0.0.5"
     tough-cookie "~2.3.3"
     tunnel-agent "^0.6.0"
     uuid "^3.1.0"
@@ -3917,10 +3910,6 @@ string_decoder@~1.1.1:
   dependencies:
     safe-buffer "~5.1.0"
 
-stringstream@~0.0.5:
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/stringstream/-/stringstream-0.0.5.tgz#4e484cd4de5a0bbbee18e46307710a8a81621878"
-
 strip-ansi@^3.0.0, strip-ansi@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-3.0.1.tgz#6a385fb8853d952d5ff05d0e8aaf94278dc63dcf"