fix: link sqlite3 statically on windows

[nebolsin]

Alternative to #104 and #105.

Use statically linked sqlite3 lib on windows (which we compile from SQLite3 "amalgamation" source distribution) to avoid conflicts with other sqlite3.dll available in the system.

Here's an output of dumpbin /dependents coveralls.exe of the produced executable, which confirms no dependency on sqlite3.dll:

Microsoft (R) COFF/PE Dumper Version 14.37.32824.0
Copyright (C) Microsoft Corporation.  All rights reserved.

Dump of file coveralls.exe

File Type: EXECUTABLE IMAGE

  Image has the following dependencies:

    CRYPT32.dll
    ADVAPI32.dll
    WS2_32.dll
    KERNEL32.dll
    dbghelp.dll
    bcrypt.dll
    USER32.dll

Also adds Vagrantfile and provision script to simplify setting up local Windows development environment.

[coveralls-official[bot]]

Pull Request Test Coverage Report for Build 6721845286

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.719%

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Totals
Change from base Build 6498958900:	0.0%
Covered Lines:	940
Relevant Lines:	1003

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💛 - Coveralls

[afinetooth]

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