Use Node 12 in Travis

The dependencies of zeromq.js have already dropped support for Node 10

.travis.yml

@@ -12,7 +12,7 @@ jobs:
     env: ZMQ_DRAFT=true
 
   - os: linux
-    node_js: "10.16"
+    node_js: "12"
     env: ZMQ_DRAFT=true INCLUDE_COMPAT_TESTS=true
 
   - os: linux
@@ -22,33 +22,33 @@ jobs:
   - os: osx
     osx_image: xcode10
     env: ZMQ_DRAFT=true
-    node_js: "10.16"
+    node_js: "12"
 
   - os: windows
-    node_js: "10.16"
+    node_js: "12"
     # https://travis-ci.community/t/build-doesnt-finish-after-completing-tests/288
     env: ZMQ_DRAFT=true YARN_GPG=no
 
   - os: windows
-    node_js: "10.16/x86"
+    node_js: "12/x86"
     # https://travis-ci.community/t/build-doesnt-finish-after-completing-tests/288
     env: ZMQ_DRAFT=true YARN_GPG=no
 
   # Test shared libraries on Linux and macOS.
   - os: linux
-    node_js: "10.16"
+    node_js: "12"
     env: ZMQ_SHARED=true
     addons: {apt: {packages: libzmq3-dev}}
 
   - os: osx
     osx_image: xcode10
-    node_js: "10.16"
+    node_js: "12"
     env: ZMQ_SHARED=true
     addons: {homebrew: {packages: zeromq, update: true}}
 
   # Test older versions of ZMQ.
   - os: linux
-    node_js: "10.16"
+    node_js: "12"
     env: ZMQ_VERSION=4.2.4
 
   # Test recent Node versions.
@@ -67,15 +67,15 @@ jobs:
   # This test ensures the delayed resolution of read/write promises is correct
   # by disabling immediate resolution (which happens 99% of the time) entirely.
   - os: linux
-    node_js: "10.16"
+    node_js: "12"
     env: ZMQ_NO_SYNC_RESOLVE=true ZMQ_DRAFT=true INCLUDE_COMPAT_TESTS=true NODE_NO_WARNINGS=1
 
   ## PREBUILD STAGE
 
   - stage: prebuild
     os: linux
     env: ARCHIVE_SUFFIX=-x64
-    node_js: "10.16"
+    node_js: "12"
     script: script/ci/prebuild.sh
 
   - stage: prebuild
@@ -86,34 +86,34 @@ jobs:
 
   - stage: prebuild
     os: linux
-    node_js: "10.16"
+    node_js: "12"
     env: ARCH=arm TRIPLE=arm-linux-gnueabihf GCC=8 ARCHIVE_SUFFIX=-armv7
     addons: {apt: {packages: [gcc-8-arm-linux-gnueabihf, g++-8-arm-linux-gnueabihf]}}
     script: script/ci/prebuild.sh
 
   - stage: prebuild
     os: linux
-    node_js: "10.16"
+    node_js: "12"
     env: ARCH=arm64 TRIPLE=aarch64-linux-gnu GCC=8 ARCHIVE_SUFFIX=-armv8
     addons: {apt: {packages: [gcc-8-aarch64-linux-gnu, g++-8-aarch64-linux-gnu]}}
     script: script/ci/prebuild.sh
 
   - stage: prebuild
     os: osx
     osx_image: xcode10
-    node_js: "10.16"
+    node_js: "12"
     script: script/ci/prebuild.sh
 
   - stage: prebuild
     os: windows
-    node_js: "10.16"
+    node_js: "12"
     # https://travis-ci.community/t/build-doesnt-finish-after-completing-tests/288
     env: YARN_GPG=no ARCHIVE_SUFFIX=-x64
     script: script/ci/prebuild.sh
 
   - stage: prebuild
     os: windows
-    node_js: "10.16/x86"
+    node_js: "12/x86"
     # https://travis-ci.community/t/build-doesnt-finish-after-completing-tests/288
     env: YARN_GPG=no ARCHIVE_SUFFIX=-x86
     script: script/ci/prebuild.sh
@@ -122,7 +122,7 @@ jobs:
 
   - stage: publish
     os: linux
-    node_js: "10.16"
+    node_js: "12"
     env: IGNORE_SCRIPTS=true
     script: script/ci/package.sh