chore: upgrade projen (#84)

This PR upgrades projen to the latest version

Author: aws-cdk-automation

.projen/deps.json

@@ -48,7 +48,7 @@
     },
     {
       "name": "projen",
-      "version": "^0.17.88",
+      "version": "^0.17.90",
       "type": "build"
     },
     {

.projen/tasks.json

@@ -42,7 +42,7 @@
           "exec": "git -c \"versionsort.suffix=-\" tag --sort=\"-version:refname\" --list \"v*\" | head -n1 > .version.tmp.json"
         },
         {
-          "exec": "if [ \"$(cat .version.tmp.json)\" == \"\" ]; then echo \"v0.1.0\" > .version.tmp.json; fi"
+          "exec": "if [ \"$(cat .version.tmp.json)\" = \"\" ]; then echo \"v0.1.0\" > .version.tmp.json; fi"
         },
         {
           "exec": "standard-version"