Install solana cli tools in CI

.travis.yml

@@ -11,6 +11,8 @@ notifications:
 cache:
   directories:
     - "~/.cache"
+    - "~/.config/share/solana"
+    - "~/.local/share/solana"
 
 services:
   - docker
@@ -18,6 +20,7 @@ services:
 env:
   global:
     - RUST_BACKTRACE=1
+    - SOLANA_VERSION=v1.4.2
 
 jobs:
   include:

.travis/install-program-deps.sh

@@ -18,3 +18,9 @@ clang-7 --version
 nvm install node
 npm install -g typescript
 node --version
+
+if [[ -n $SOLANA_VERSION ]]; then
+  sh -c "$(curl -sSfL https://release.solana.com/$SOLANA_VERSION/install)"
+fi
+PATH="~/.local/share/solana/install/active_release/bin:$PATH"
+solana --version