Revert "LL-8975 bump stellar (#1644)"

This reverts commit 3784f7d.

package.json

@@ -124,7 +124,7 @@
     "secp256k1": "^4.0.3",
     "semver": "^7.3.5",
     "sha.js": "^2.4.11",
-    "stellar-sdk": "^10.0.1",
+    "stellar-sdk": "^9.1.0",
     "triple-beam": "^1.3.0",
     "winston": "^3.4.0",
     "xstate": "^4.28.1",

yarn.lock

@@ -6708,10 +6708,10 @@ stack-utils@^2.0.3:
   dependencies:
     escape-string-regexp "^2.0.0"
 
-stellar-base@^7.0.0:
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/stellar-base/-/stellar-base-7.0.0.tgz#6ebb359fc0a5e8fe6ed855c62de78cbec779b463"
-  integrity sha512-Sfk/u/6HT+8xSQ4HvTI3XgthTS3fhv/ie6Jx4OzLvg81pt09bDDN5YvRbG6v3gZdiRA0pwg2RRz5YS3ph5ePEg==
+stellar-base@^6.0.6:
+  version "6.0.6"
+  resolved "https://registry.yarnpkg.com/stellar-base/-/stellar-base-6.0.6.tgz#2f95ad35ab6901a2fc0d5cb5b483436241b7123c"
+  integrity sha512-v0t9jeP456plMpye8W2vRq2lTvMUvRkskH5GGfqgMTeX+gBAwp7Y67wYphRt2pGQ2NXtxlsgEBSBKWvNxGp76A==
   dependencies:
     base32.js "^0.1.0"
     bignumber.js "^4.0.0"
@@ -6739,7 +6739,7 @@ stellar-sdk@^10.0.1:
     eventsource "^1.0.7"
     lodash "^4.17.21"
     randombytes "^2.1.0"
-    stellar-base "^7.0.0"
+    stellar-base "^6.0.6"
     toml "^2.3.0"
     tslib "^1.10.0"
     urijs "^1.19.1"