chore: differentiate between Travis and Github Actions before install

web3.js/.travis/before_install.sh

@@ -1,5 +1,6 @@
 # |source| this file
 
+if [[ -n $TRAVIS ]]; then
   wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
   sudo apt-add-repository "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-10 main"
   sudo apt-get update
@@ -8,7 +9,13 @@ sudo apt-get install -y openssl --allow-unauthenticated
   sudo apt-get install -y libssl-dev --allow-unauthenticated
   sudo apt-get install -y libssl1.1 --allow-unauthenticated
   clang-7 --version
+fi
 
 sh -c "$(curl -sSfL https://release.solana.com/edge/install)"
 PATH="$HOME/.local/share/solana/install/active_release/bin:$PATH"
 solana --version
+
+if [[ -n $GITHUB_ACTIONS ]]; then
+  echo "$HOME/.local/share/solana/install/active_release/bin" >> $GITHUB_PATH
+  npm install -g npm@7
+fi