fix(gh-tests): Fix local npm registry config (#692)

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Fix the NPM registry config in the Github tests.

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#### Migration notes

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Author: Natoandro

.github/workflows/tests.yml

@@ -262,7 +262,6 @@ jobs:
       - shell: bash
         env:
           WASM_FILE: target/debug/typegraph_core.wasm
-          NPM_CONFIG_REGISTRY: http://localhost:4873
         run: |
           echo pwd in $(pwd)
 
@@ -292,6 +291,8 @@ jobs:
           # start the docker containers
           deno run -A dev/env.ts base prisma
 
+          export NPM_CONFIG_REGISTRY=http://localhost:4873
+
           # publish the sdk to the local registry
           cd typegraph/node/sdk/dist
           npm config set "//localhost:4873/:_authToken" fooBar