feat: GRE tunnel support for Transit Gateway (#39)

Author: kennburger

.travis.yml

@@ -3,7 +3,7 @@ language: node_js
 sudo: false
 
 before_install:
-- '[ "${TRAVIS_PULL_REQUEST}" == "false" ] && openssl aes-256-cbc -K $encrypted_cb7060b3a42b_key -iv $encrypted_cb7060b3a42b_iv -in transit-gateway.env.enc -out transit-gateway.env -d || true'
+- '[ "${TRAVIS_PULL_REQUEST}" == "false" ] && openssl aes-256-cbc -K $encrypted_3d8a3eb98382_key -iv $encrypted_3d8a3eb98382_iv -in transit.env.enc -out transit.env -d || true'
 - '[ "${TRAVIS_PULL_REQUEST}" == "false" ] && openssl aes-256-cbc -K $encrypted_6de0fb2f002f_key -iv $encrypted_6de0fb2f002f_iv -in directlink.env.enc -out directlink.env -d || true'
 - '[ "${TRAVIS_PULL_REQUEST}" == "false" ] && openssl aes-256-cbc -K $encrypted_fc092b9428d6_key -iv $encrypted_fc092b9428d6_iv -in cis.env.enc -out cis.env -d || true'
 - '[ "${TRAVIS_PULL_REQUEST}" == "false" ] && openssl aes-256-cbc -K $encrypted_89a9eb4f9417_key -iv $encrypted_89a9eb4f9417_iv -in dns.env.enc -out dns.env -d || true'