dmg format, CI retry

.travis.yml

@@ -33,7 +33,7 @@ before_install:
   - chmod 600 $HOME/.ssh/id_ecdsa
 
 install:
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then mkdir -p bin; curl -L https://github.com/aria2/aria2/releases/download/release-1.27.1/aria2-1.27.1-osx-darwin.tar.bz2 | tar --strip-components=2 -C bin -jxf - aria2-1.27.1/bin/aria2c; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then mkdir -p bin; curl --location --retry 5 https://github.com/aria2/aria2/releases/download/release-1.27.1/aria2-1.27.1-osx-darwin.tar.bz2 | tar --strip-components=2 -C bin -jxf - aria2-1.27.1/bin/aria2c; fi
 
   - npm install
   - npm prune

appveyor.yml

@@ -34,12 +34,12 @@ init:
 install:
   - set PATH=%PATH%;C:\MinGW\msys\1.0\bin # tar xz
   - mkdir -p bin
-  - curl -L -o aria2-1.28.0-win-32bit-build1.zip https://github.com/aria2/aria2/releases/download/release-1.28.0/aria2-1.28.0-win-32bit-build1.zip
+  - curl --location --retry 5 -output aria2-1.28.0-win-32bit-build1.zip https://github.com/aria2/aria2/releases/download/release-1.28.0/aria2-1.28.0-win-32bit-build1.zip
   - unzip -o aria2-1.28.0-win-32bit-build1.zip aria2-1.28.0-win-32bit-build1/aria2c.exe
   - mv aria2-1.28.0-win-32bit-build1/aria2c.exe bin
   - rm -rf aria2-1.28.0-win-32bit-build1 aria2-1.27.1-win-32bit-build1.zip
-  - curl -L 'http://downloads.sourceforge.net/project/msys2/REPOS/MSYS2/i686/bsdtar-3.2.1-1-i686.pkg.tar.xz' | tar --strip-components=2 -C bin -Jxf - usr/bin/bsdtar.exe
-  - curl -L 'http://downloads.sourceforge.net/project/msys2/Base/i686/msys2-base-i686-20161025.tar.xz' | tar --strip-components=3 -C bin -Jxf - msys32/usr/bin/msys-2.0.dll msys32/usr/bin/msys-bz2-1.dll msys32/usr/bin/msys-gcc_s-1.dll msys32/usr/bin/msys-iconv-2.dll msys32/usr/bin/msys-lzma-5.dll msys32/usr/bin/msys-lzo2-2.dll msys32/usr/bin/msys-nettle-6.dll msys32/usr/bin/msys-xml2-2.dll msys32/usr/bin/msys-z.dll msys32/usr/bin/sha256sum.exe msys32/usr/bin/msys-intl-8.dll
+  - curl --location --retry 5 -output 'http://downloads.sourceforge.net/project/msys2/REPOS/MSYS2/i686/bsdtar-3.2.1-1-i686.pkg.tar.xz' | tar --strip-components=2 -C bin -Jxf - usr/bin/bsdtar.exe
+  - curl --location --retry 5 -output 'http://downloads.sourceforge.net/project/msys2/Base/i686/msys2-base-i686-20161025.tar.xz' | tar --strip-components=3 -C bin -Jxf - msys32/usr/bin/msys-2.0.dll msys32/usr/bin/msys-bz2-1.dll msys32/usr/bin/msys-gcc_s-1.dll msys32/usr/bin/msys-iconv-2.dll msys32/usr/bin/msys-lzma-5.dll msys32/usr/bin/msys-lzo2-2.dll msys32/usr/bin/msys-nettle-6.dll msys32/usr/bin/msys-xml2-2.dll msys32/usr/bin/msys-z.dll msys32/usr/bin/sha256sum.exe msys32/usr/bin/msys-intl-8.dll
 
   - ps: Install-Product node
   - npm install

package.json

@@ -77,6 +77,7 @@
       ]
     },
     "dmg": {
+      "format": "ULFO",
       "contents": [
         {
           "x": 448,