Update SDK version in travis

Author: pulsejet

.travis.yml

@@ -5,7 +5,7 @@ cache:
   - ClientApp/node_modules
   - "~/.local/share/NuGet/Cache"
 install:
-- wget -O dotnet.tar.gz https://download.microsoft.com/download/3/7/C/37C0D2E3-2056-4F9A-A67C-14DEFBD70F06/dotnet-sdk-2.1.300-preview2-008530-linux-x64.tar.gz
+- wget -O dotnet.tar.gz https://download.microsoft.com/download/8/8/5/88544F33-836A-49A5-8B67-451C24709A8F/dotnet-sdk-2.1.300-linux-x64.tar.gz
 - mkdir -p $HOME/dotnet && tar zxf dotnet.tar.gz -C $HOME/dotnet
 - export PATH=$PATH:$HOME/dotnet
 - dotnet restore