mod failed due to calculating has of non go file

# Command:

```
cyclonedx-gomod mod -verbose
```

# Error:

```
....
1:33AM DBG skipping license detection module=golang.org/x/sync@v0.0.0-20210220032951-036812b2e83c reason="no detector provided"
1:33AM DBG calculating module hash module=golang.org/x/sync@v0.0.0-20210220032951-036812b2e83c
1:33AM DBG converting module to component module=golang.org/x/sys@v0.0.0-20220209214540-3681064d5158
1:33AM DBG skipping license detection module=golang.org/x/sys@v0.0.0-20220209214540-3681064d5158 reason="no detector provided"
1:33AM DBG calculating module hash module=golang.org/x/sys@v0.0.0-20220209214540-3681064d5158
1:33AM DBG converting module to component module=golang.org/x/text@v0.3.7
1:33AM DBG skipping license detection module=golang.org/x/text@v0.3.7 reason="no detector provided"
1:33AM DBG calculating module hash module=golang.org/x/text@v0.3.7
1:33AM DBG converting module to component module=golang.org/x/time@v0.0.0-20210723032227-1f47c861a9ac
1:33AM DBG skipping license detection module=golang.org/x/time@v0.0.0-20210723032227-1f47c861a9ac reason="no detector provided"
1:33AM DBG calculating module hash module=golang.org/x/time@v0.0.0-20210723032227-1f47c861a9ac
1:33AM DBG converting module to component module=golang.org/x/xerrors@v0.0.0-20200804184101-5ec99f83aff1
1:33AM DBG skipping license detection module=golang.org/x/xerrors@v0.0.0-20200804184101-5ec99f83aff1 reason="no detector provided"
1:33AM DBG calculating module hash module=golang.org/x/xerrors@v0.0.0-20200804184101-5ec99f83aff1
1:33AM DBG converting module to component module=google.golang.org/api@v0.70.0
1:33AM DBG skipping license detection module=google.golang.org/api@v0.70.0 reason="no detector provided"
1:33AM DBG calculating module hash module=google.golang.org/api@v0.70.0
1:33AM DBG converting module to component module=google.golang.org/appengine@v1.6.7
1:33AM DBG skipping license detection module=google.golang.org/appengine@v1.6.7 reason="no detector provided"
1:33AM DBG calculating module hash module=google.golang.org/appengine@v1.6.7
{"level":"error","error":"failed to convert modules: failed to calculate module hash: open /.env.development: no such file or directory","time":"2022-10-12T01:33:05Z"}
```

Reproduce the failure with `cyclonedx-gomod mod -verbose` and start by tracing the module-hash calculation reported in the error. Determine why the command attempts to open `/.env.development`, then verify that non-Go files no longer cause the command to fail and that module conversion completes successfully.

Written by the indexing model from the issue text.